[Search UI] Holding Enter to cycle through matches

[lzm0]

Feature Request

Allow holding Enter in the search UI to continuously cycle through matches, stopping when the key is released, since this is the behavior of Chrome and Terminal.app.
In addition, the cycling should wrap around, this has been discussed before in #9790 and #9762.

As of https://github.com/ghostty-org/ghostty/commits/5ff99ba9a, this is not implemented.