Trigger HCR after compilation

[iusildra]

Follow up of the implementation of hot code replace (HCR) in the scala-debug-adapter (link) and in the vscode extension (link). Trigger a 2nd compilation (after the first one due to saving) to ensure that HCR does not happen during compilation

[iusildra]

I'll also need to synchronize the redefineClasses and setBreakpoints commands. Currently, metals send these 2 at the same second, but setBreakpoint does not wait for compilation to be finished and breakpoints might not be verified anymore, so the debugger won't stop

[adpi2]

@tgodzik This PR is ready to be reviewed and merged. It forces a compilation just before a hot code replace and it does not forward the HCR request if the compilation fails.

EDIT:

I'll also need to synchronize the redefineClasses and setBreakpoints commands. Currently, metals send these 2 at the same second, but setBreakpoint does not wait for compilation to be finished and breakpoints might not be verified anymore, so the debugger won't stop

That's not an issue anymore. The debugger takes care of reinstalling all breakpoints in source files that changed.

[tgodzik]

Looks good! Thanks for pushing this forward!