Add disposable management classes and interface

- Introduced IDisposable interface for defining disposable behavior
- Implemented Disposable class for single disposable resources
- Created DisposableList class to manage multiple disposables
- Updated index file to export the new classes and interface

src/lang/disposables/IDisposable.ts

@@ -0,0 +1,3 @@
+export default interface IDisposable {
+  dispose(): void;
+}