The copy-link decoration widget (contentEditable="false") injected
inside headings prevented browsers from deleting the last remaining
character via Backspace or Delete keys. Only show the widget when the
heading has more than one character of content.
* feat: add heading extension with unique ID support and scroll functionality
* Added unique id for heading
* remove baseUrl heading storage
* move heading to extensions package
* WIP
* support anchors in mentions
* enhance scrolling functionality
* nodeId function
* fix nanoid import
* Bring unique-id extension local
* fixes
* fix internal link scroll in public pages
* add unique id server side
* rename mention anchor to anchorId
* capture first anchorId on paste
---------
Co-authored-by: Romik <40670677+RomikMakavana@users.noreply.github.com>
