Proof of Concept: Transformer-less EventBus

[ZZZank]

This PR removed two EventBus related transformers: EventSubscriptionTransformer and EventSubscriberTransformer, and added lambda-based listener registration.

Removal of EventSubscriptionTransformer

EventSubscriptionTransformer works by injecting .getListenerList(), .isCancelable(), and .hasResult() implementation for event class, and make use of JVM method dispatch to handle inheritance of event properties.

To get rid of this transformer while still recognize custom implementation, three ClassValue is used for caching the result of three previously mentioned methods, each containing some reflection tricks to use custom implementation when possible. See EventProperties class in this PR for more detail.

Removal of EventSubscriberTransformer

EventSubscriberTransformer scans every method in every class to find those with @SubscribeEvent, then make the method, and the declaring class, public.

To get rid of this transformer, method searching logic in EventBus is rewritten, to include all declared methods as candidate, instead of only public methods. EventListenerFactory is also modified to handle non-public method.

New method searching logic should also be faster when working on static listener class.

Lambda-based listener

Full method:

public <T extends Event> void addListener(
        Class<T> eventType,
        EventPriority priority,
        boolean receiveCanceled,
        Consumer<T> handler
) {}

The "Infer event type from handler" feature is not implemented yet.

---

Tests mostly written by AI, see this commit

[Ecdcaeb]

still need call getListenerList here? another way needed

[Ecdcaeb]

Suggested change

	if (type.isAnnotationPresent(target)) {
	if (c.isAnnotationPresent(target)) {