Added bookmarks

• Added:
- bookmarks for GabPRO members only
- migration for creation of StatusBookmarks
- all necessary routes, controllers
- redux for adding, removing, fetching and displaying bookmarks
- bookmark icon
- doorkeeper scopes
- backend and frontend support

Bookmarks behave like likes/favorites, except they aren't shared with other users and do not have an associated counter.

dfea7368c9

app/models/status_bookmark.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+# == Schema Information
+#
+# Table name: status_bookmarks
+#
+#  id         :integer          not null, primary key
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#  account_id :integer          not null
+#  status_id  :integer          not null
+#
+
+class StatusBookmark < ApplicationRecord
+  include Paginable
+
+  belongs_to :account, inverse_of: :status_bookmarks
+  belongs_to :status,  inverse_of: :status_bookmarks
+
+  validates :status_id, uniqueness: { scope: :account_id }
+
+  before_validation do
+    self.status = status.reblog if status&.reblog?
+  end
+end