C# : Add events for node signals

[n-tiz]

I don't know if it's planned or not, but i think it could be very interesting to define godot signal as C# event, for multiple reason:

• Using the connect method can be very frustrating without auto-completion to find the signal name.
• Writing the correct method also for the same reason.
• The C# already have a nice built-in way to handle events.
• The name of signals and method could not be wrong (typo or code change).

Here is an exemple:
Button.Connect("pressed", this, "OnPressed");
could be write as
Button.Pressed += OnPressed;

[Calinou]

• Using the connect method can be very frustrating without auto-completion to find the signal name.
• Writing the correct method also for the same reason.

Signals and Callables are first-class types in Godot 4.0 (including in GDScript), so this should no longer be an issue.

I also remember C# events already being implemented in 4.0, but my memory may be hazy.

[markdibarry]

For reference: They were partly implemented 2 years ago, but no work has been done on them since.