added

[Core API] Draft endpoints

  • GET /conversations/{conversation_id}/drafts - List drafts within a conversation
  • POST /channels/{channel_id}/drafts - Create a draft as a new conversation
  • POST /conversations/{conversation_id}/drafts/{draft_id} - Create a draft as a reply to a conversation
  • PATCH /drafts/{draft_id} - Update a draft
  • DELETE /drafts/{draft_id} - Delete a draft