Add ash framework

lib/mv/repo.ex

@@ -1,5 +1,22 @@
 defmodule Mv.Repo do
-  use Ecto.Repo,
-    otp_app: :mv,
-    adapter: Ecto.Adapters.Postgres
+  use AshPostgres.Repo,
+    otp_app: :mv
+
+  @impl true
+  def installed_extensions do
+    # Add extensions here, and the migration generator will install them.
+    ["ash-functions"]
+  end
+
+  # Don't open unnecessary transactions
+  # will default to `false` in 4.0
+  @impl true
+  def prefer_transaction? do
+    false
+  end
+
+  @impl true
+  def min_pg_version do
+    %Version{major: 17, minor: 2, patch: 0}
+  end
 end