Add syncable NavigationMenuItem entity to core schema (#17232)

Implements a new syncable `navigationMenuItem` entity in the core schema
to replace the workspace `favorite` entity.

## Next Steps
- Frontend integration ([separate
PR](https://github.com/twentyhq/twenty/pull/17268))
- Data migration (separate PR)

packages/twenty-server/src/engine/metadata-modules/metadata-engine.module.ts

@@ -4,6 +4,7 @@ import { AiAgentMonitorModule } from 'src/engine/metadata-modules/ai/ai-agent-mo
 import { AiAgentModule } from 'src/engine/metadata-modules/ai/ai-agent/ai-agent.module';
 import { AiChatModule } from 'src/engine/metadata-modules/ai/ai-chat/ai-chat.module';
 import { CommandMenuItemModule } from 'src/engine/metadata-modules/command-menu-item/command-menu-item.module';
+import { NavigationMenuItemModule } from 'src/engine/metadata-modules/navigation-menu-item/navigation-menu-item.module';
 import { CronTriggerModule } from 'src/engine/metadata-modules/cron-trigger/cron-trigger.module';
 import { DataSourceModule } from 'src/engine/metadata-modules/data-source/data-source.module';
 import { DatabaseEventTriggerModule } from 'src/engine/metadata-modules/database-event-trigger/database-event-trigger.module';
@@ -31,6 +32,7 @@ import { WorkspaceMetadataVersionModule } from 'src/engine/metadata-modules/work
     ServerlessFunctionLayerModule,
     SkillModule,
     CommandMenuItemModule,
+    NavigationMenuItemModule,
     AiAgentModule,
     AiAgentMonitorModule,
     AiChatModule,
@@ -52,6 +54,7 @@ import { WorkspaceMetadataVersionModule } from 'src/engine/metadata-modules/work
     ServerlessFunctionModule,
     SkillModule,
     CommandMenuItemModule,
+    NavigationMenuItemModule,
     AiAgentModule,
     AiChatModule,
     ViewModule,