Implement AsyncDisposable to support TS 5.2's using

[cristianrgreco]

Feature info here: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-5-2.html#using-declarations-and-explicit-resource-management

Before:

const container = await new GenericContainer(/* ... */).start();
/* ... */
await container.stop();

After:

await using container = await new GenericContainer(/* ... */).start();
/* ... */

Same for Network and DockerComposeEnvironment.

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[Copilot]

Pull Request Overview

This PR adds support for TypeScript 5.2's using keyword, implementing automatic resource disposal for test containers. The changes modernize resource management by replacing manual await container.stop() calls with automatic disposal when containers go out of scope.

• Updates container and network classes to implement AsyncDisposable interface
• Modifies test files to use await using for automatic resource cleanup
• Enhances helper functions to return disposable objects

Reviewed Changes

Copilot reviewed 73 out of 73 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/testcontainers/src/test-container.ts	Extends StartedTestContainer interface with AsyncDisposable
packages/testcontainers/src/generic-container/started-generic-container.ts	Implements Symbol.asyncDispose for containers
packages/testcontainers/src/network/network.ts	Implements AsyncDisposable for networks
packages/testcontainers/src/utils/test-helper.ts	Updates helper to return disposable event stream
Test files across all modules	Replace manual cleanup with await using declarations

[joebowbeer]

@cristianrgreco Shouldn't this call this.stop?

Suggested change

	async [Symbol.asyncDispose]() {
	await this.startedTestContainer[Symbol.asyncDispose]();
	}
	async [Symbol.asyncDispose]() {
	await this.stop();
	}