feat!: moving to vite + typescript

[WDaan]

Vite

Move to Vite for faster build times and to remove lot of unneeded and deprecated packages.

This PR is actually quite important because right now the project is a little stuck.

node-sass/sass/sass-loader is icompatible with nodejs 16+
vue-cli-service with webpack is slow

I want to move to Vite, because it's a lot faster, but there are still some issues:

• Proxying post requests is not working => solved
• Make sure PWA config still works => BREAKING, users need to re-install the PWA
• Package version fix in production build
• vue-i18n dynamic language import

I also cant move the project to Vue3, because it relies heavily on Vuetify which does not support Vue3 yet.

PR Checklist

• I've started from master
• I've only committed changes related to this PR
• All Unit tests pass
• I've removed all commented code
• I've removed all unneeded console.log statements

[WDaan]

Vite proxying now works again, had to disable CSRF protection during development.
Can now continue working on this branch:

• see if PWA config works
• move to vue3? (or maybe wait for vuetify v3 to be stable)

[WDaan]

Cant' get package version to work
PWA is still broken :(

[WDaan]

Fixed PWA + package version !