Added new role for moderator to Groups

• Added:
- new role for moderator to Groups

app/models/concerns/group_interactions.rb

@@ -13,6 +13,10 @@ module GroupInteractions
       follow_mapping(GroupAccount.where(group_id: target_group_ids, account_id: account_id, role: :admin), :group_id)
     end
 
+    def moderator_map(target_group_ids, account_id)
+      follow_mapping(GroupAccount.where(group_id: target_group_ids, account_id: account_id, role: :moderator), :group_id)
+    end
+
     private
 
     def follow_mapping(query, field)

app/models/group_account.rb

@@ -13,7 +13,10 @@
 
 class GroupAccount < ApplicationRecord
   self.ignored_columns = ["unread_count"]
-  enum role: { admin: "admin" }
+  enum role: {
+    admin: "admin",
+    moderator: "moderator"
+  }
 
   belongs_to :group
   belongs_to :account