Store and use a cache of the loaded ModInfo data to mod-info-cache.json
in the mods directory during startup. For simplicity this does not
cache mods added to the controller or host after startup, these get
added to the cache on the next startup.
Add suffixes like Ms and Ns to variables whos time unit is not in
seconds. This is aligning with a new code style of putting units
on variables that are not in SI base units.
Structure the storage of mods on the controller into into a reusable
component in preparation for the host using the same kind of mod storage
to retrieve and cache the mods it needs to run mod packs on instances.
Hornwitser