Add drum/joke reaction

[davidegirardi]

Underline the awesome joke someone just said in the call with a twist on a classic punchline drum fill.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

:white_check_mark: fkwp
:x: Davide Girardi

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[spaetz]

@davidegirardi sorry for pinging you, I am just an outsider :-), but this seems to be stuck waiting for you to sign the CLA.

[davidegirardi]

@spaetz I'm an Element employee, no CLA needed. I also put the file as "created by Element" in the license file.

[davidegirardi]

I merged the livekit branch onto this and re-run CI, which seems happy https://github.com/element-hq/element-call/actions/runs/17757667742. The first time it failed because of repo.yarnpkg.com return 500s.