WIP FEATURE: Improve metrics and modernise plugin

[Sebobo]

New features:

• Track search queries based on Neos.ContentRepository.Search
• Sortable cache entry table
• Cache entry table directly shows rendering times
• Show messages from MessageCollector in additional metrics
• MessageCollector can now be used as a static class for simplified usage
• Show cumulative cache hits, misses and sets in cache metric summary

Improvements:

• Introduce PHP Stan and verify in GH Action
• Check JS build in GH Action
• Refactoring in js components
• Bump JS dependencies
• Reduce js bundle size

TODO:

• Update readme & docs