Add support for freeform reactions

[kittykat]

What would you like to do?

I would like to be able to send freeform reactions on all platforms

Why would you like to do it?

• MSC2677 supports reactions with long keys, i.e. text reactions
• This feature is already available through other apps and our users can see those reactions
• It is already possible to send freeform reactions through /devtools and bots from Element, so at the moment the feature exists but is obscure
• Element users can already "+1" a freeform reaction on any platform by clicking it

How would you like to achieve it?

• By being able to compose a freeform reaction on any platform
• Being able to view long reactions in a user friendly way (I can't see any upper limit set by the MSC)
• Be able to report reactions to moderators
• Remove reactions as a moderator/admin user in a room

Sub-issues

• Allow free-form reactions element-web#19409
• Add support for posting freeform reactions on Android element-android#6028
• Add support for posting freeform reactions on iOS element-ios#6147

[JokerGermany]

Would be cool if it would support displaying pictures as reaction as well.
e.G. this would be useful for Discord Bridges.

[10Meisterbaelle]

I don't understand why this is not a feature in the official Matrix app. It's litterally a Matrix feature.

[daniellekirkwood]

This is not something we're open to at the minute so I'm going to go ahead and make it a discussion