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-server/src/engine/twenty-orm/custom.workspace-entity.ts

@@ -4,7 +4,6 @@ import { DEFAULT_LABEL_IDENTIFIER_FIELD_NAME } from 'src/engine/metadata-modules
 import { BaseWorkspaceEntity } from 'src/engine/twenty-orm/base.workspace-entity';
 import { type FieldTypeAndNameMetadata } from 'src/engine/workspace-manager/utils/get-ts-vector-column-expression.util';
 import { type AttachmentWorkspaceEntity } from 'src/modules/attachment/standard-objects/attachment.workspace-entity';
-import { type FavoriteWorkspaceEntity } from 'src/modules/favorite/standard-objects/favorite.workspace-entity';
 import { type NoteTargetWorkspaceEntity } from 'src/modules/note/standard-objects/note-target.workspace-entity';
 import { type TaskTargetWorkspaceEntity } from 'src/modules/task/standard-objects/task-target.workspace-entity';
 import { type TimelineActivityWorkspaceEntity } from 'src/modules/timeline/standard-objects/timeline-activity.workspace-entity';
@@ -22,7 +21,6 @@ export class CustomWorkspaceEntity extends BaseWorkspaceEntity {
   updatedBy: ActorMetadata;
   noteTargets: NoteTargetWorkspaceEntity[];
   taskTargets: TaskTargetWorkspaceEntity[];
-  favorites: FavoriteWorkspaceEntity[];
   attachments: AttachmentWorkspaceEntity[];
   timelineActivities: TimelineActivityWorkspaceEntity[];
   searchVector: string;