[FEAT] Add a way to check if an event is connected to

[howmanysmall]

Describe your feature

If you so much as forget to implement one event, your entire game just spirals into a death loop of errors. It makes debugging which specific events are unimplemented impossible until you manage to hit that. It would be nice to have a function that I can call with IsConnectedTo() after a delay to make sure everything is connected to.

Would also help with cleaning up old unused code.

Alternatives

I have just been monkeypatching this stuff into the API. There's no other alternative.

Implementation Details

-- for ManyAsync:
		IsImplemened = function(): boolean
			return #reliable_events[1] > 0
		end;
-- For SingleAsync
		IsImplemened = function(): boolean
			return reliable_events[1] ~= nil
		end;

[jackdotink]

The issue is valid but I think this solution isn't a great way to solve it. Instead could we put the event's name in logs?

[sasial-dev]

Or we just publicly expose the event connections?

[jackdotink]

API surface is the most expensive thing zap can do because then we have to worry about backwards compatibility. It should be the last thing we reach for to solve problems.

[howmanysmall]

The issue is valid but I think this solution isn't a great way to solve it. Instead could we put the event's name in logs?

Log could work. Anything to just check if I've connected.