feat(core) auto register on... options as event listener callbacks

lib/core/Cetra.js

@@ -21,6 +21,27 @@ class Cetra extends Emitter {
 	constructor(options = new Map()) {
 		super();
 		this.#identifier = this.uid();
+
+		if (!(options instanceof Map) && typeof options == 'object') {
+			options = new Map(Object.entries(options));
+		}
+
+		for (const key of Cetra.#defaultSettings.keys()) {
+			let value = options.get(key);
+			if (typeof value == 'undefined') {
+				value = Cetra.#defaultSettings.get(key);
+			}
+			this.#internals
+				.get('settings')
+				.set(key, value);
+		}
+
+
+		for (const [key, cb] of options) {
+			if (!key.startsWith('on') || typeof cb != 'function') continue;
+			this.on(key, cb);
+		}
+
 		this.#init();
 	}
 
@@ -61,7 +82,7 @@ class Cetra extends Emitter {
 		);
 
 		Cetra.#instances.set(this.#identifier, this);
-		this.emit('afterInit', this);
+		this.emit('onAfterInit', this);
 	}
 
 	/**