Copilot instructions

1---
2description: Guidelines for writing code using IDisposable
3---
4 
5Core symbols:
6* `IDisposable`
7	* `dispose(): void` - dispose the object
8* `Disposable` (implements `IDisposable`) - base class for disposable objects
9	* `this._store: DisposableStore`
10	* `this._register<T extends IDisposable>(t: T): T`
11		* Try to immediately register created disposables! E.g. `const someDisposable = this._register(new SomeDisposable())`
12* `DisposableStore` (implements `IDisposable`)
13	* `add<T extends IDisposable>(t: T): T`
14	* `clear()`
15* `toDisposable(fn: () => void): IDisposable` - helper to create a disposable from a function
16 
17* `MutableDisposable` (implements `IDisposable`)
18	* `value: IDisposable | undefined`
19	* `clear()`
20	* A value that enters a mutable disposable (at least once) will be disposed the latest when the mutable disposable is disposed (or when the value is replaced or cleared).
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