Better support for clickable URLs

At present, if there is a URL in a source file, the best way to open it is to use Right Click -> "Open Link", which is a feature of the terminal I'm using. However, this creates issues when the URL is longer than the display area, as it will get clipped to only include the characters that are currently displayed.

It would be nice to be able to open URLs directly from the editor without having to manually select the relevant text or worry about lining up the viewport. It could also function as a nice feature for those whose terminals don't natively support clickable URLs.

Off the top of my head, it seems like overriding the double-click behavior for URLs would work well enough, but it's possible that there's a better solution.

Start by tracing the editor's double-click behavior and how URLs in source files are identified or opened. Compare that flow with the terminal's existing Open Link behavior, then define a self-contained interaction that works for URLs extending beyond the visible display area and verify it in the editor.