Fix: Properly propagate compiler validation errors to the LSP

[LesterEvSe]

Project

LSP and Error Handler

What happened?

The LSP needs to display errors. The error handler should also display a clearer error message, for example: "-> was defined at line...". The same applies to variables, functions, etc.

[stringhandler]

#246 adds in more file line info to errors and warnings

[gerau]

As the LSP was moved into a separate repository, this issue is no longer relevant.

Also, it's a problem with how the LSP works -- it uses a compiler as a dependency, so the binary is not impacting the LSP at all.

[LesterEvSe]

Understood, that makes sense