Feat: Multiple page template PDP - CMS Structure (#2225)

## What's the purpose of this pull request?

- [x] Removes singleton.
- [x] Adds PDP template content type structure.  

## How it works?

Use the `vendemo` account, and now you will be able to see this template
structure under the settings tab of hCMS.
<img width="1554" alt="Screenshot 2024-02-06 at 17 27 24"
src="https://github.com/vtex/faststore/assets/11325562/3bab00e1-09d1-4f07-ba47-c3c6539423ce">
<img width="1055" alt="Screenshot 2024-02-06 at 16 16 35"
src="https://github.com/vtex/faststore/assets/11325562/79523c3a-eae4-428e-a4cb-971253b77663">
the way we are going to deal with this content in frontend will be
addressed in another task and the details are under the Multiple
template page RFC.

See the response from hCMS API.
https://vendemo.myvtex.com/admin/new-cms/faststore/pdp

the other task will also cover the documentation.

### References

Doc PR
- #2236
[RFC Multiple page template
details](https://docs.google.com/document/d/1qQ573B9iVadSrqjvjSt8ExDu7-uxa3_COXlKvqkTQ8Q)

---------

Co-authored-by: Gabriel Antiqueira <[email protected]>

packages/core/cms/faststore/content-types.json

@@ -103,8 +103,27 @@
     "id": "pdp",
     "name": "Product Page",
     "scopes": ["pdp"],
-    "isSingleton": true,
-    "configurationSchemaSets": []
+    "configurationSchemaSets": [
+      {
+        "name": "Settings",
+        "configurations": [
+          {
+            "name": "template",
+            "schema": {
+              "title": "Template",
+              "type": "object",
+              "properties": {
+                "value": {
+                  "title": "PDP template value (e.g. Slug: /apple-magic-mouse/p OR /department/category/subcategory/)",
+                  "type": "string",
+                  "description": "Possible values: the PDP slug template (e.g. '/apple-magic-mouse/p'); A PLP template (e.g. '/department/' OR '/department/category/' OR '/department/category/subcategory/'). If empty, this template will be the generic PDP."
+                }
+              }
+            }
+          }
+        ]
+      }
+    ]
   },
   {
     "id": "plp",

packages/core/cypress/integration/seo.test.js

@@ -176,9 +176,7 @@ describe('Collection Page Seo', () => {
     cy.get('link[rel="canonical"]')
       .should('exist')
       .should(($link) => {
-        expect($link.attr('href')).to.eq(
-          `${storeUrl}${pages.collection}`
-        )
+        expect($link.attr('href')).to.eq(`${storeUrl}${pages.collection}`)
       })
   })
 
@@ -233,9 +231,7 @@ describe('Filtered Collection Page Seo', () => {
     cy.get('link[rel="canonical"]')
       .should('exist')
       .should(($link) => {
-        expect($link.attr('href')).to.eq(
-          `${storeUrl}${pages.collection}`
-        )
+        expect($link.attr('href')).to.eq(`${storeUrl}${pages.collection}`)
       })
   })