Rewrite the entire framework

[aalin]

This is the code from the rewrite that I started writing in August 2024.

Todo

• [x] Implement a better VDOM
• [x] Make the root layout work
• [x] Fix string callbacks (onclick="event.preventDefault()")
• [x] Generate image versions and static assets
• [x] Reload routes when pages are added/removed
• [x] mayu build to build apps
  • [x] Make sure it includes everything
  • [ ] #32
  • [ ] Maybe generate a tarball with all the assets?
• [x] mayu start to run built apps
• [x] Prometheus endpoint
  • [ ] Remove irrelevant metrics
• [x] Rewrite stack traces in Mayu::Modules::System by resolving modules
• [ ] #5
• [ ] Use https://github.com/socketry/async-container

Issues that should have been fixed already in this branch

• [x] #59
• [x] #58
• [x] #9
• [x] #14