Added object pool, event system collision system

assets/Scripts/Services/EventSystem/Signal.ts

@@ -0,0 +1,16 @@
+import { ISignal } from "./ISignal";
+
+export class Signal<T> implements ISignal<T> {
+    private handlers: ((data: T) => void)[] = [];
+
+    public on(handler: (data: T) => void): void {
+        this.handlers.push(handler);
+    }
+    public off(handler: (data: T) => void): void {
+        this.handlers = this.handlers.filter((h) => h !== handler);
+    }
+
+    public trigger(data: T): void {
+        [...this.handlers].forEach((handler) => handler(data));
+    }
+}