[Permissions] Implement getRoles (#9955)

In this PR

- introducing roles module to separate roles logic (assign a Role, get a
workspace's roles etc.) from permission logic (check if a user has a
permission)
- Introduces getRoles endpoint to fetch a workspace's roles
- introduces the first permission check: getRoles in only accessible to
users with permission on ROLE setting. Implemented
validatesUserHasWorkspaceSettingPermissionOrThrow

packages/twenty-server/src/engine/middlewares/middleware.service.ts

@@ -146,6 +146,7 @@ export class MiddlewareService {
     request.workspaceId = data.workspace.id;
     request.workspaceMetadataVersion = metadataVersion;
     request.workspaceMemberId = data.workspaceMemberId;
+    request.userWorkspaceId = data.userWorkspaceId;
   }
 
   private getStatus(error: any): number {