Add an own emoji-picker as emoji-mart replacement

[ErikMichelson]

What is your question?
Currently the react-client uses emoji-mart. Because that has neither the current emoji definitions nor is maintained actively, @mrdrogdrog, @DerMolly and me looked for alternatives.
One idea was to use the emoji picker from element-web but as it is heavy integrated into the matrix-react-sdk, that's also no solution.
Even if it's quite some work, we thought that building an own emoji-picker (in a separate repository) is probably the best solution.
As data source we could use this one: https://github.com/milesj/emojibase/

Other opinions on that?

[mrdrogdrog]

Another option was to fork and maintain emoji-mart. But that code is awfull and we would have to rewrite half of the code we need. Also we don't want to maintain the stuff that we don't need.

[mrdrogdrog]

Well. We could use the matrix react sdk if we turn HedgeDoc into a collaborative markdown matrix client 😏

[mrdrogdrog]

https://github.com/nolanlawson/emoji-picker-element

[ccoenen]

I have also raised the question in riot, if this is a must-have / must replace for 2.0. Especially if it becomes neccessary to develop something entirely new, I'd suggest putting this in a release after 2.0.

[DerMolly]

That entirely depends on the schedule for 2.0 if we target a release in December or earlier, yes. If the release is more in the vain of April 2021 we‘ll have time to do that for 2.0.

[mrdrogdrog]

TBH: we're running out of issues that are 2.0 relevant but can be solved until the backend is ready. So there is a good chance that this issue will be part of 2.0.

[mrdrogdrog]

https://github.com/nolanlawson/emoji-picker-element

This picker doesn't support custom css classes for emojis, which is necessary for fork-awesome. Who wants to create an issue or talk to the dev? @ErikMichelson ?