Support quick actions through work item notes

What does this MR do and why?

• Allows applying quick actions in a note for work items.

Some background knowledge for reviewers

When you leave a comment with quick actions e.g., /close or /approve, the body text containing these quick actions goes through several services.

• Note::CreateService where Note models comments/threads/discussions.
  • Note::QuickActionsService: it interprets a raw text containing quick actions and spits out parsed update parameters /assign @foo => { assignee_ids: [1] }. Internally the service uses QuickActions::InterpretService.
    • Noteable update service where noteable is the underlying object such as MergeRequest, Issue or Epic.

In this MR we want to support a new type of noteable WorkItem.

How to set up and validate locally

1. Prepare a new Work Item of type Task.

Demo

demo

Note the id of the task you just created by running (yes WorkItem is internally using issues table.)

gdk psql -c 'SELECT id FROM issues ORDER BY id DESC LIMIT 1;'

2. Set a new weight for the work item. (noteableId is the global id of the task you just created.)

mutation createWorkItemNote {
  createNote(
    input: {
      noteableId: "gid://gitlab/WorkItem/635",
      body: "Set weight \n/weight 1",
      discussionId: null
    }
  ) {
    note {
      id
      discussion {
        id
        notes {
          nodes {
            id
            body
          }
        }
      }
    }
    errors
    __typename
  }
}

Refresh the browser and check the weight's been updated for the task.

3. Now try setting health status (it should fail because Tasks don't support the attribute.)

mutation createWorkItemNote {
  createNote(
    input: {
      noteableId: "gid://gitlab/WorkItem/635",
      body: "/health_status on_track",
      discussionId: null
    }
  ) {
     ...
  }
}

{
  "data": {
    "createNote": {
      "note": null,
      "errors": [
        "Commands only Could not apply health_status command.",
        "Command names [\"health_status\"]"
      ],
      "__typename": "CreateNotePayload"
    }
  }
}

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.