Big Refactor

[Alextopher]

This PR replaces #48 and #57

• merges random subprojects into this repo
• move config file handling into it's own module
• remove most placeholders
• interface based aggregators (more stable and easier to add more)
• interface based and context aware scheduling (needs a bit more work)
• updates dependencies
• adds more CI
• remove broken webserver caching
• go 1.21

Second pass:

• logging: remove Panic
• moved aggregator logic to it's own module
• scheduler: now returns an error if any task setup fails
• scheduler: will create /var/log/mirror if it doesn't exist
• live map: websocket messages are now grouped by time instead of by a fixed number
• config: moved "rsyncd.conf" generation into its own file
• influxdb api connection is no longer a global variable
• map.js: improved the code clarity and performance a little bit

[Alextopher]

This PR should never be merged