Allow to group bookmarks in folders

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

priv/repo/migrations/20240223165000_create_bookmark_folders.exs

@@ -0,0 +1,27 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2024 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Repo.Migrations.CreateBookmarkFolders do
+  use Ecto.Migration
+
+  def change do
+    create_if_not_exists table(:bookmark_folders, primary_key: false) do
+      add(:id, :uuid, primary_key: true)
+      add(:name, :string, null: false)
+      add(:emoji, :string)
+      add(:user_id, references(:users, type: :uuid, on_delete: :delete_all))
+
+      timestamps()
+    end
+
+    alter table(:bookmarks) do
+      add_if_not_exists(
+        :folder_id,
+        references(:bookmark_folders, type: :uuid, on_delete: :nilify_all)
+      )
+    end
+
+    create_if_not_exists(unique_index(:bookmark_folders, [:user_id, :name]))
+  end
+end