Add 2.16 release notes (#7914)

* Add 2.16 release notes

Signed-off-by: Fanit Kolchina <[email protected]>

* Apply suggestions from code review

Signed-off-by: kolchfa-aws <[email protected]>

* Update release-notes/opensearch-documentation-release-notes-2.16.0.md

Signed-off-by: kolchfa-aws <[email protected]>

---------

Signed-off-by: Fanit Kolchina <[email protected]>
Signed-off-by: kolchfa-aws <[email protected]>

release-notes/opensearch-documentation-release-notes-2.16.0.md

@@ -0,0 +1,35 @@
+# OpenSearch Documentation Website 2.16.0 Release Notes
+
+The OpenSearch 2.16.0 documentation includes the following additions and updates.
+
+## New documentation for 2.16.0
+
+- Alerting plugin - changed default setting to true for v2.16. [#7868](https://github.com/opensearch-project/documentation-website/pull/7868)
+- Add experimental feature flag to dashboard assistant [#7855](https://github.com/opensearch-project/documentation-website/pull/7855)
+- Add documentation for ml inference search request processor/ search response processor [#7852](https://github.com/opensearch-project/documentation-website/pull/7852)
+- Update documentation for create / update repository api [#7851](https://github.com/opensearch-project/documentation-website/pull/7851)
+- Add documentation for query insights - query metrics feature [#7846](https://github.com/opensearch-project/documentation-website/pull/7846)
+- Add doc for binary format support in k-NN [#7840](https://github.com/opensearch-project/documentation-website/pull/7840)
+- Add predefined model interface doc [#7830](https://github.com/opensearch-project/documentation-website/pull/7830)
+- Add compatibility page [#7821](https://github.com/opensearch-project/documentation-website/pull/7821)
+- Sorting and Search After in Hybrid Search [#7820](https://github.com/opensearch-project/documentation-website/pull/7820)
+- Add disk free space cluster settings [#7799](https://github.com/opensearch-project/documentation-website/pull/7799)
+- [Doc] Lucene inbuilt scalar quantization [#7797](https://github.com/opensearch-project/documentation-website/pull/7797)
+- Documentation Updates for plugins.query.datasources.enabled SQL Setting [#7794](https://github.com/opensearch-project/documentation-website/pull/7794)
+- Document new Split and Sort SearchResponseProcessors [#7767](https://github.com/opensearch-project/documentation-website/pull/7767)
+- Adds Documentation for dynamic query parameters for kNN search request  [#7761](https://github.com/opensearch-project/documentation-website/pull/7761)
+- Add strict_allow_templates option for the dynamic mapping parameter [#7745](https://github.com/opensearch-project/documentation-website/pull/7745)
+- Document CreateAnomalyDetectorTool [#7742](https://github.com/opensearch-project/documentation-website/pull/7742)
+- Document the nested_path parameter in agent search tools [#7741](https://github.com/opensearch-project/documentation-website/pull/7741)
+- Move bulk API's batch_size parameter to processors [#7719](https://github.com/opensearch-project/documentation-website/pull/7719)
+- Add documentation for configuring the password hashing algorithm and its properties [#7697](https://github.com/opensearch-project/documentation-website/pull/7697)
+- Add documentation for Deprovision Workflow API allow_delete parameter [#7639](https://github.com/opensearch-project/documentation-website/pull/7639)
+- Add new update_fields parameter to update workflow API [#7632](https://github.com/opensearch-project/documentation-website/pull/7632)
+- Add fingerprint processor [#7631](https://github.com/opensearch-project/documentation-website/pull/7631)
+- Document new ingest and search pipeline allowlist settings [#7414](https://github.com/opensearch-project/documentation-website/pull/7414)
+- Update docs for new clause count setting [#7391](https://github.com/opensearch-project/documentation-website/pull/7391)
+- Add Threat Intelligence Section [#7905](https://github.com/opensearch-project/documentation-website/pull/7905)
+
+## Documentation for 2.16.0 experimental features
+
+- Ml commons batch inference [#7899](https://github.com/opensearch-project/documentation-website/pull/7899)