C# cleaner signal emission (v2)

[OlliO6]

Provides a type safe way to emit signals in c#.

Previous:

EmitSignal(SignalName.SomethingHappened, arg1, arg2, arg3);
// This does not have syntax highlighting and compile error when signature is not met.

Now:

GetEmitter<SignalEmitter.SomethingHappened>().Emit(arg1, arg2, arg3);

I also implemented that enums can be used.

Previous PR: C#: Cleaner signal emission
Can't be archieved seamlessly (allocations or pullotion)

Alternative: C#: Generate strongly-typed method to raise signal events and fix event accessibility

• Pollutes classes
• Shorter code

[Chaosus]

Thanks for the contribution. Conflicts must be resolved, commits must be squashed (see https://docs.godotengine.org/en/latest/community/contributing/pr_workflow.html#modifying-a-pull-request).

[OlliO6]

Ok, I created some kind of a mess by trying to squish the commits. But yeah here's a new PR squished and no conflicts #70424