feature(provider): implement comment tombstones for threads

[bdbch]

This pull request includes changes to the TiptapCollabProvider class to support handling deleted comments separated from non-deleted comments in threads. The most important changes include adding a new deletedComments field to the TCollabThread type, modifying methods to manage and retrieve deleted comments, and updating the logic for deleting comments.
llaborative editing sessions.

Enhancements to thread and comment management:

• TiptapCollabProvider.ts: Added methods to get, create, update, and delete threads and comments, including support for deleted comments. Added JSDoc comments for better documentation. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]

New configuration options:

• TiptapCollabProvider.ts: Introduced deleteThreadOnFirstCommentDelete option to automatically delete a thread when its first comment is deleted. Added defaultDeleteCommentOptions for handling comment deletion.

Updates to data types:

• types.ts: Updated TCollabThread and TCollabComment types to include deletedComments and deletedAt fields, respectively. Added DeleteCommentOptions type for comment deletion options. [1] [2]

[bdbch]

@nperez0111 lets discuss here! 😄

You had some thoughts about the getThreadComments function being able to fetch deleted comments?

[nperez0111]

This is great