feat: user invitation revoke mutation added

packages/hoppscotch-backend/src/errors.ts

@@ -99,6 +99,12 @@ export const USER_IS_OWNER = 'user/is_owner' as const;
  */
 export const USER_IS_ADMIN = 'user/is_admin' as const;
 
+/**
+ * User invite deletion failure error due to invitation not found
+ * (AdminService)
+ */
+export const USER_INVITATION_NOT_FOUND = 'user/invitation_not_found' as const;
+
 /**
  * Teams not found
  * (TeamsService)