Remove Favorite and FavoriteFolder from workspace schema (#19536)

## Summary

- Removes all workspace schema definitions for `Favorite` and
`FavoriteFolder` entities, which have been fully migrated to
`NavigationMenuItems`
- Deletes 26 standalone files including workspace entities, NestJS
modules, services, listeners, jobs, standard application builders (field
metadata, views, view fields, view field groups, indexes, page layouts),
mocks, and integration tests
- Cleans up ~40 modified files: removes `favorites` relation from 10
workspace entities and their field metadata utils, removes entries from
all builder maps, shared constants (`STANDARD_OBJECTS`,
`CoreObjectNameSingular`, `DEFAULT_RELATIONS_OBJECTS_STANDARD_IDS`), SDK
default relations, AI tool filtering, and standard object icons

packages/twenty-front/src/modules/object-record/graphql/record-gql-fields/utils/__tests__/__snapshots__/generateDepthRecordGqlFieldsFromObject.test.ts.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
+// Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`generateDepthRecordGqlFieldsFromObject should generate depth one record gql fields from object 1`] = `
 {
@@ -25,9 +25,6 @@ exports[`generateDepthRecordGqlFieldsFromObject should generate depth one record
   "deletedAt": true,
   "domainName": true,
   "employees": true,
-  "favorites": {
-    "id": true,
-  },
   "id": true,
   "idealCustomerProfile": true,
   "introVideo": true,

packages/twenty-front/src/modules/object-record/graphql/record-gql-fields/utils/__tests__/__snapshots__/generateDepthRecordGqlFieldsFromRecord.test.ts.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
+// Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`generateDepthRecordGqlFieldsFromRecord should generate depth one record gql fields from empty record 1`] = `
 {
@@ -13,7 +13,6 @@ exports[`generateDepthRecordGqlFieldsFromRecord should generate depth one record
   "deletedAt": false,
   "domainName": false,
   "employees": false,
-  "favorites": false,
   "id": false,
   "idealCustomerProfile": false,
   "introVideo": false,
@@ -49,7 +48,6 @@ exports[`generateDepthRecordGqlFieldsFromRecord should generate depth one record
   "deletedAt": false,
   "domainName": true,
   "employees": false,
-  "favorites": false,
   "id": true,
   "idealCustomerProfile": false,
   "introVideo": false,