Lists (#5703)

* Add structure for lists

* Add list timeline streaming API

* Add list APIs, bind list-account relation to follow relation

* Add API for adding/removing accounts from lists

* Add pagination to lists API

* Add pagination to list accounts API

* Adjust scopes for new APIs

- Creating and modifying lists merely requires "write" scope
- Fetching information about lists merely requires "read" scope

* Add test for wrong user context on list timeline

* Clean up tests

app/models/follow_request.rb

@@ -3,11 +3,11 @@
 #
 # Table name: follow_requests
 #
+#  id                :integer          not null, primary key
 #  created_at        :datetime         not null
 #  updated_at        :datetime         not null
-#  account_id        :bigint           not null
-#  id                :bigint           not null, primary key
-#  target_account_id :bigint           not null
+#  account_id        :integer          not null
+#  target_account_id :integer          not null
 #
 
 class FollowRequest < ApplicationRecord