Link detection API

[mymikemiller]

Language extensions need to be able to handle link detection in the terminal so they can properly jump into a library when stack traces are clicked.

Example using Dart:
When I print out a stack trace and cmd+click on a file link, VSCode fails to navigate to package files in my pub_cache.

For illustrative purposes in the screenshots, I navigated to the file by jumping to it when debugging. The file does not pop up when cmd+clicking the link.

Note that searching the workspace for the text of the line does show the result, and I can click into the line in the editor.

This is because

[Tyriar]

/duplicate #91290