Render hyperlinks (OSC 8) in embedded terminal

[bluss]

Problem

Make hyperlinks in command outputs clickable in the embedded terminal (:term) in neovim if the hosting terminal or UI supports it.

Commands such as ls --hyperlink=always (GNU coreutils) and ripgrep are examples of utils that can output hyperlink escapes.

Expected behavior

ls -l --hyperlink=always should produce clickable links when used inside neovim's embedded terminal (:term). Compare with how this works in standalone terminals (such as gnome-terminal, kitty, or others, also in tmux) which make these links clickable. Use the existing neovim 0.10 support for OSC 8 (in extmarks in that case) to accomplish this.

Discussion

Briefly discussed here #28620 (reply in thread) where @gpanders shared a thought