Hyperlink using extmarks url

[creasty]

extmarks can set a "url" highlight attribute, so the text region can become a clickable hyperlink (assuming UI support). The TUI renders URLs using the OSC 8 control sequence, enabling clickable text in supporting terminals.

https://neovim.io/doc/user/news-0.10.html

It can be used to improve the appearance/usability of JSDoc in the hover float.