Relocate @kbn/core inside src/core/packages/core

.buildkite/scripts/steps/checks/saved_objects_definition_change.sh

@@ -5,7 +5,7 @@ set -euo pipefail
 source .buildkite/scripts/common/util.sh
 
 echo --- Check SO definition changes
-cmd="node scripts/jest_integration -u src/core/server/integration_tests/ci_checks"
+cmd="node scripts/jest_integration -u src/core/packages/core/server/integration_tests/ci_checks"
 
 eval "$cmd"
 check_for_changed_files "$cmd" true

.eslintrc.js

@@ -1915,7 +1915,7 @@ module.exports = {
     {
       files: [
         // core-team owned code
-        'src/core/**',
+        'src/core/packages/core/**',
         'x-pack/plugins/features/**',
         'x-pack/plugins/licensing/**',
         'x-pack/plugins/global_search/**',

.github/CODEOWNERS

@@ -1822,7 +1822,7 @@ packages/kbn-monaco/src/esql @elastic/kibana-esql
 /x-pack/test_serverless/api_integration/test_suites/**/telemetry/ @elastic/kibana-core
 /x-pack/test/functional/es_archives/cases/migrations/8.8.0 @elastic/response-ops
 
-#CC# /src/core/server/csp/ @elastic/kibana-core
+#CC# /src/core/packages/core/server/csp/ @elastic/kibana-core
 #CC# /src/plugins/saved_objects/ @elastic/kibana-core
 #CC# /x-pack/plugins/cloud/ @elastic/kibana-core
 #CC# /x-pack/plugins/features/ @elastic/kibana-core
@@ -1848,7 +1848,7 @@ x-pack/plugins/cloud_integrations/cloud_full_story/server/config.ts @elastic/kib
 
 # Kibana Localization
 /src/dev/i18n_tools/  @elastic/kibana-localization @elastic/kibana-core
-/src/core/public/i18n/  @elastic/kibana-localization @elastic/kibana-core
+/src/core/packages/core/public/i18n/  @elastic/kibana-localization @elastic/kibana-core
 #CC# /x-pack/platform/plugins/private/translations/ @elastic/kibana-localization @elastic/kibana-core
 
 # Kibana Platform Security
@@ -1887,7 +1887,7 @@ x-pack/plugins/cloud_integrations/cloud_full_story/server/config.ts @elastic/kib
 /.github/workflows/codeql.yml @elastic/kibana-security
 /.github/workflows/codeql-stats.yml @elastic/kibana-security
 /src/dev/eslint/security_eslint_rule_tests.ts @elastic/kibana-security
-/src/core/server/integration_tests/config/check_dynamic_config.test.ts @elastic/kibana-security
+/src/core/packages/core/server/integration_tests/config/check_dynamic_config.test.ts @elastic/kibana-security
 /src/plugins/telemetry/server/config/telemetry_labels.ts @elastic/kibana-security
 /packages/kbn-std/src/is_internal_url.test.ts @elastic/kibana-core @elastic/kibana-security
 /packages/kbn-std/src/is_internal_url.ts @elastic/kibana-core @elastic/kibana-security

STYLEGUIDE.mdx

@@ -630,7 +630,7 @@ Doing so ensures the styles are never separated or lost on import and allows
 for better modularization (smaller individual plugin asset footprint).
 
 All SASS (.scss) files will automatically build with the [EUI](https://elastic.github.io/eui/#/guidelines/sass)
-& Kibana invisibles (SASS variables, mixins, functions) from the [`globals_[theme].scss` file](src/core/public/styles/core_app/_globals_v8light.scss).
+& Kibana invisibles (SASS variables, mixins, functions) from the [`globals_[theme].scss` file](src/core/packages/core/public/styles/core_app/_globals_v8light.scss).
 
 While the styles for this component will only be loaded if the component exists on the page,
 the styles **will** be global and so it is recommended to use a three letter prefix on your

dev_docs/getting_started/hello_world_plugin.mdx

@@ -72,7 +72,7 @@ And add the following to it:
   ],
   "exclude": [],
   "references": [
-    { "path": "../../src/core/tsconfig.json" }
+    { "path": "../../src/core/packages/core/tsconfig.json" }
   ]
 }
 ```

dev_docs/key_concepts/anatomy_of_a_plugin.mdx

@@ -112,7 +112,7 @@ If you are developing in TypeScript (which we recommend), you will need to add a
   ],
   "exclude": [],
   // If you import another plugin's types, point to their `tsconfig.json` file.
-  "references": [{ "path": "../../src/core/tsconfig.json" }]
+  "references": [{ "path": "../../src/core/packages/core/tsconfig.json" }]
 }
 ```
 

dev_docs/tutorials/advanced_settings.mdx

@@ -204,7 +204,7 @@ To change or remove a `uiSetting`, you must migrate the whole `config` Saved Obj
 
 For example, in 7.9.0, `siem` as renamed to `securitySolution`, and in 8.0.0, `theme:version` was removed:
 
-**src/core/server/ui_settings/saved_objects/migrations.ts**
+**src/core/packages/core/server/ui_settings/saved_objects/migrations.ts**
 
 ```ts
 import { SavedObjectUnsanitizedDoc, SavedObjectSanitizedDoc } from '@kbn/core/server';
@@ -271,4 +271,4 @@ first upgraded. Note that you might need to add an extra attribute to verify tha
 applied again in the future.
 
 For example, we needed to transform the `defaultIndex` attribute, and we added an extra `isDefaultIndexMigrated` attribute for this purpose.
-See `src/core/server/ui_settings/saved_objects/transforms.ts` and [#13339](https://github.com/elastic/kibana/pull/133339) for an example.
+See `src/core/packages/core/server/ui_settings/saved_objects/transforms.ts` and [#13339](https://github.com/elastic/kibana/pull/133339) for an example.

dev_docs/tutorials/saved_objects.mdx

@@ -14,7 +14,7 @@ The folder should contain a file per type, named after the snake_case name of th
 **src/plugins/my_plugin/server/saved_objects/dashboard_visualization.ts**
 
 ```ts
-import { SavedObjectsType } from 'src/core/server';
+import { SavedObjectsType } from 'src/core/packages/core/server';
 
 export const dashboardVisualization: SavedObjectsType = {
   name: 'dashboard_visualization', [1]
@@ -79,7 +79,7 @@ For example, the mappings defined by the dashboard_visualization Saved Object ty
 **src/plugins/my_plugin/server/saved_objects/dashboard_visualization.ts**
 
 ```ts
-import { SavedObjectsType } from 'src/core/server';
+import { SavedObjectsType } from 'src/core/packages/core/server';
 
 export const dashboardVisualization: SavedObjectsType = {
   name: 'dashboard_visualization',
@@ -126,8 +126,8 @@ Do not use field mappings like you would use data types for the columns of a SQL
 SQL index. Only specify field mappings for the fields you wish to search on or query. By specifying `dynamic: false`
  in any level of your mappings, Elasticsearch will accept and store any other fields even if they are not specified in your mappings.
 
-Never use `enabled: false` or `index: false` in your mappings. Elasticsearch does not support toggling these mapping options, so if 
-your plugin ever needs to query the data, you will not be able to do so. Since these fields cannot be queried, they would require 
+Never use `enabled: false` or `index: false` in your mappings. Elasticsearch does not support toggling these mapping options, so if
+your plugin ever needs to query the data, you will not be able to do so. Since these fields cannot be queried, they would require
 migrating to a new field and making associated code changes. Instead, use `dynamic: false` which provides the same flexibility while
 maintaining the future ability to query fields if necessary.
 
@@ -233,7 +233,7 @@ The first version must be numbered as version 1, incrementing by one for each ne
 
 ```ts
 import { schema } from '@kbn/config-schema';
-import { SavedObjectsType } from 'src/core/server';
+import { SavedObjectsType } from 'src/core/packages/core/server';
 
 
 const schemaV1 = schema.object({ title: schema.string({ maxLength: 50, minLength: 1 }) });
@@ -339,7 +339,7 @@ For complete control over your HTTP APIs and custom handling, declare your type
 The other option that allows you to build your own HTTP APIs and still use the client as-is is to declare your type as hidden from the global saved objects HTTP APIs as `hiddenFromHttpApis: true`
 
 ```ts
-import { SavedObjectsType } from 'src/core/server';
+import { SavedObjectsType } from 'src/core/packages/core/server';
 
 export const foo: SavedObjectsType = {
   name: 'foo',

dev_docs/tutorials/screenshotting/screenshotting.mdx

@@ -33,7 +33,7 @@ Here is an example of how you can take a screenshot of a Kibana URL.
 
 ```typescript
 import { lastValueFrom } from 'rxjs';
-import type { CoreSetup, Plugin } from 'src/core/server';
+import type { CoreSetup, Plugin } from 'src/core/packages/core/server';
 import type { ScreenshottingStart } from 'x-pack/plugins/screenshotting/server';