🗑️ chore: Remove Deprecated Project Model and Associated Fields (#11773)

* chore: remove projects and projectIds usage

* chore: empty line linting

* chore: remove isCollaborative property across agent models and related tests

- Removed the isCollaborative property from agent models, controllers, and tests, as it is deprecated in favor of ACL permissions.
- Updated related validation schemas and data provider types to reflect this change.
- Ensured all references to isCollaborative were stripped from the codebase to maintain consistency and clarity.

packages/api/src/agents/validation.ts

@@ -94,9 +94,6 @@ export const agentUpdateSchema = agentBaseSchema.extend({
   avatar: z.union([agentAvatarSchema, z.null()]).optional(),
   provider: z.string().optional(),
   model: z.string().nullable().optional(),
-  projectIds: z.array(z.string()).optional(),
-  removeProjectIds: z.array(z.string()).optional(),
-  isCollaborative: z.boolean().optional(),
 });
 
 interface ValidateAgentModelParams {