refactor(chat): import mdi icons

[ShGKme]

🏁 Checklist

• 🌏 Tested with different browsers / clients:
  • Chromium (Chrome / Edge / Opera / Brave)
  • Firefox
  • Safari
  • Talk Desktop
  • Not risky to browser differences / client
• 🖌️ Design was reviewed, approved or inspired by the design team
• ⛑️ Tests are included or not possible
• 📗 User documentation in https://github.com/nextcloud/documentation/tree/master/user_manual/talk has been updated or is not required

[Antreesy]

Is it correctly tree-shakes the lib? I thought about that, but didn't want to add a 3Mb library just for 7 strings

[ShGKme]

Is it correctly tree-shakes the lib? I thought about that, but didn't want to add a 3Mb library just for 7 strings

Hmm... It must work fine, and on server it does. But in Talk it doesn't, and I do not understand, why

[nickvergessen]

/backport to stable30

[Antreesy]

Found server PR: nextcloud/server#43488
Looked at the upstream issue, it might be that esbuild is the reason it's not minified

[Antreesy]

Superseded by #14870