Classes

[zkrising]

Formally known as dans, but named classes in Kamaitachi so it can also be used for jubeat's colours and so on.

These should be ported. Could be handled in score-import-main.ts as a post-cycle hook. probably.

I guess the main issue is actually knowing when or how to update these. Certain requests (mainly IR requests) provide metadata that lets us update classes. Sometimes, a class is dependent on a rating property instead of IR info (i.e. skill > 6000, rather than IR saying you are kaiden), so this definitely seems rather import-dependent.

We could have something like a set of importType "handle class update" hooks, but maybe they'd need to be returned from the parser as things like file/json:batch-manual could cause obvious generic-issues.

Will sleep on it, but could be more of a pain than initially thought.

[zkrising]

Merged wtih #460