[WEB-3787] fix: project joining date (#7127)

* fix: return project joining date

* fix: added project's joining date

* fix: set created_at as read_only_fields

---------

Co-authored-by: gakshita <akshitagoyal1516@gmail.com>

packages/types/src/project/projects.d.ts

@@ -114,6 +114,7 @@ export interface IProjectMembership {
   id: string;
   member: string;
   role: TUserPermissions;
+  created_at: string;
 }
 
 export interface IProjectBulkAddFormData {

packages/types/src/users.d.ts

@@ -12,6 +12,7 @@ export interface IUserLite {
   id: string;
   is_bot: boolean;
   last_name: string;
+  joining_date?: string;
 }
 export interface IUser extends IUserLite {
   // only for uploading the cover image