New action: Support on new Google Meet Emojis

[nunners]

Google Meet now has "all the emojis" for reactions - would it be possible to somehow add custom ones to be able to respond with them?

Thanks - great plugin!

[snowborn]

Would be great to have!

[iamkirkbater]

I also love the idea of having this. So I've started trying to poke around at adding it in #59. More details on what's left to do there.