feat(core): Unify application components shutdown (#8097)

## Summary

Add `ShutdownService` and `OnShutdown` decorator for more unified way to
shutdown different components. Use this new way in the following
components:

- HTTP(S) server
- Pruning service
- Push connection
- License

---------

Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/cli/src/commands/webhook.ts

@@ -19,7 +19,7 @@ export class Webhook extends BaseCommand {
 		help: flags.help({ char: 'h' }),
 	};
 
-	protected server = new WebhookServer();
+	protected server = Container.get(WebhookServer);
 
 	constructor(argv: string[], cmdConfig: IConfig) {
 		super(argv, cmdConfig);