Refactor UI

[samuelwei]

Type (Highlight the corresponding type)

• Bugfix
• Feature
• Documentation
• Refactoring (e.g. Style updates, Test implementation, etc.)
• Other (please describe):

Checklist

• Code updated to current master branch head
• Passes CI checks
• Is a part of an issue
• Tests added for the bugfix or newly implemented feature, describe below why if not
• Changelog is updated
• Documentation of code and features exists

Changes

• Replace awesome-mask with maska
• Replace vue-swatches with own component
• Refactor i18n
• Add audio notification
• Add global event emitter / pubsub (mitt)
• Refactor pagination
• Fix drag'n dop file upload
• Refactor code (slots, templates)
• Renamed env option VITE_DEFAULT_LOCALE to DEFAULT_LOCALE (VITE_DEFAULT_LOCALE deprecated)
• Renamed env option VITE_AVAILABLE_LOCALES to ENABLED_LOCALES (VITE_AVAILABLE_LOCALES deprecated)

Other information

This PR is cherry-picking changes from #743 that can be used with Vue 2. This way we can test these changes isolated from the upcoming vue 3 changes and add frontend software tests.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (8df5f1b) 94.71% compared to head (fa98071) 95.10%.

❗ Current head fa98071 differs from pull request most recent head b91e70f. Consider uploading reports for the commit b91e70f to get more accurate results

Files	Patch %	Lines
resources/js/components/Room/FileComponent.vue	75.00%	1 Missing ⚠️
resources/js/services/EventBus.js	66.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #747      +/-   ##
============================================
+ Coverage     94.71%   95.10%   +0.39%     
- Complexity     1007     1016       +9     
============================================
  Files           273      274       +1     
  Lines          6487     6501      +14     
  Branches        526      528       +2     
============================================
+ Hits           6144     6183      +39     
+ Misses          328      304      -24     
+ Partials         15       14       -1     

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