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/Disposable.ts

@@ -0,0 +1,23 @@
+import type IDisposable from './IDisposable';
+
+export default class Disposable implements IDisposable {
+  private _isDisposed = false;
+  private _disposable: () => void;
+
+  constructor(disposable: () => void) {
+    this._disposable = disposable;
+  }
+
+  get isDisposed(): boolean {
+    return this._isDisposed;
+  }
+
+  public dispose(): void {
+    if (this._isDisposed) {
+      return;
+    }
+
+    this._disposable();
+    this._isDisposed = true;
+  }
+}

src/lang/disposables/DisposableList.ts

@@ -0,0 +1,17 @@
+import type IDisposable from './IDisposable';
+
+export default class DisposableList implements IDisposable {
+  private readonly _disposables: IDisposable[] = [];
+
+  public add(disposable: IDisposable): void {
+    this._disposables.push(disposable);
+  }
+
+  public dispose(): void {
+    while (this._disposables.length) {
+      const disposable = this._disposables.shift() as IDisposable;
+
+      disposable.dispose();
+    }
+  }
+}

src/lang/disposables/IDisposable.ts

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

src/lang/disposables/index.ts

@@ -0,0 +1,6 @@
+import type IDisposable from './IDisposable';
+import Disposable from './Disposable';
+import DisposableList from './DisposableList';
+
+export type {IDisposable};
+export {Disposable, DisposableList};