chore: move `debug.sh` into launch config

[danielroe]

does this work as well for you, when using the 'Debug: Start debugging' command in vscode?

[typeholes]

It does work and the debugger does connect automatically. Two issues that I see:

1. Without a problems matcher, we need to make sure the builds complete before clicking "debug anyway"
2. the UI isn't a watcher a. Ideally we'd see UI updates as we change the code, but this may not be realistic b. UI is not recompiled when clicking the restart button. We need to kill the build watch to get it to recompile

2b is what kept me from going this route. I think I'd rather keep f5 as just building the extension

[typeholes]

https://code.visualstudio.com/docs/editor/tasks#_compound-tasks looks like it might be helpful