use more compact initialization code

[NovemLinguae]

Currently, all my user scripts use something like...

$( async () => {
	await mw.loader.using( [ 'mediawiki.api' ], async () => {
		await ( new Links( mw ) ).execute();
	} );
} );

SD0001's standard way of doing it is more compact. Maybe refactor to this:

$.when( $.ready, mw.loader.using( [ 'mediawiki.api' ] ) ).then(
	( new Links( mw ) ).execute();
);