Rich text editor | Update dependency on Tiptap

[vivinkrishna-ni]

Pull Request

🤨 Rationale

1. Update all the Tiptap extensions to the latest version and fixes the build error from Update npm dependencies #1771
2. Bug 2651659: Comments acceptance tests failing in latest nimble/sl-comments-lib update
   The linked tests might fail because of the package update with the deprecated method used here for the mention-extesion. Here is the error from the console log: ERROR TypeError: this.options.renderLabel is not a function at Object.renderHTML (create-tiptap-editor.ts:213:30).

👩‍💻 Implementation

1. Bump all the Tiptap versions to the latest 2.2.2
2. Replaced the deprecated renderLabel method with the recommended renderText method for mention support.

🧪 Testing

Manually verified the mention node rendering and other basic flows like adding an @mention and setting it via setMarkdown etc.,

✅ Checklist

• I have updated the project documentation to reflect my changes or determined no changes are needed.