feat: removes auto injection of userAgent service

[willviles]

Ember v4.0 removes support for implicit injections, as perf emberjs/ember.js#19680. If you were relying on this feature in your code, you should migrate your code base and explicitly inject the userAgent service at the call sites.

If you absolutely must temporarily restore the old behavior, you can include this intializer as app/intializers/user-agent.js:

ember-useragent/addon/initializers/user-agent.js

Lines 7 to 14 in 32039b6

	export function initialize() {
	const application = arguments[1] || arguments[0];
	application.inject('controller', 'userAgent', 'service:userAgent');
	application.inject('component', 'userAgent', 'service:userAgent');
	application.inject('route', 'userAgent', 'service:userAgent');
	application.inject('view', 'userAgent', 'service:userAgent');
	}

Please note, that you will still have to migrate your app to use explicit injections, in order to be able to upgrade to Ember v4.0, so this should only be used as a last-resort temporary band-aid.

Ref: #41 (comment).
Thanks to @buschtoens