Add VoiceOver actions

[TheQuinbox]

I was very happy to find this Mastodon client is almost entirely accessible out-of-the-box to people like me who use the VoiceOver screen reader. However, I do have one request. VoiceOver actions to perform common actions such as liking, boosting etc. Currently we have to go into the Toot details screen to do this, which isn't a deal breaker, but actions would definitely make it more efficient.