migrated to nuxt

[CommanderStorm]

Fixes #473
Fixes #1032

Proposed Changes (include Screenshots if possible)

• migrate from vue clientside rendering to nuxt ssr

TODO:

• Make sure that the environment variables listed below work properly and that staging/new prod/old prod still works
• Look into sentry
  currently not suported upstream: Plan for Nuxt 3 version nuxt-community/sentry-module#530
• Look into analytics
• Look into proper error handling (404s,5xxs)

How to test this PR

1. docker pull ghcr.io/tum-dev/navigatum-webclient:pr-1058
   docker run -p 3000:3000 -e NUXT_PUBLIC_API_URL=https://nav.tum.de -e NUXT_PUBLIC_CDN_URL=https://nav.tum.de -e NUXT_PUBLIC_FEEDBACK_URL=https://nav.tum.de -e NUXT_PUBLIC_MAPS_URL=https://nav.tum.de ghcr.io/tum-dev/navigatum-webclient:pr-1058

How has this been tested?

• npm run dev
• docker, see above

Checklist

• I have updated the documentation / No need to update the documentation
• I have run the linter