Config versions and a reinit subcommand

[strawmelonjuice]

Cynthia Mini consists out of a wide variety of configuration formats, the publication-json, the global config toml, etc.

Config schemas like those are bound to change as features grow, and so, should be versioned.

By versioning them, backwards compatibility is guaranteed, because parsing them with an older version of the loader then updating them to fit into the global format used by the Cynthia Server at that moment will just work.

With the reinit subcommand all config files can be rewritten in their newer schemas.