Add disposable util

src/app/utils/disposable.ts

@@ -0,0 +1,8 @@
+export type DisposeCallback<Q extends unknown[] = [], R = void> = (...args: Q) => R;
+export type DisposableContext<P extends unknown[] = [], Q extends unknown[] = [], R = void> = (
+  ...args: P
+) => DisposeCallback<Q, R>;
+
+export const disposable = <P extends unknown[], Q extends unknown[] = [], R = void>(
+  context: DisposableContext<P, Q, R>
+) => context;