feat: add oidc login using keycloak

priv/repo/migrations/20250405114509_add_user_name.exs

@@ -0,0 +1,9 @@
+defmodule Putzplan.Repo.Migrations.AddUserName do
+  use Ecto.Migration
+
+  def change do
+    alter table(:users, primary_key: false) do
+      add :name, :string, null: false
+    end
+  end
+end