feat(ash): added accounts, user for authentication

lib/accounts/accounts.ex

@@ -0,0 +1,13 @@
+defmodule Mv.Accounts do
+  use Ash.Domain,
+    extensions: [AshPhoenix]
+
+  resources do
+    resource Mv.Accounts.User do
+      define(:create_user, action: :create)
+      define(:list_users, action: :read)
+      define(:update_user, action: :update)
+      define(:destroy_user, action: :destroy)
+    end
+  end
+end