Advancement Hooks

@๐ŸŒˆ Kandashi ๐ŸŒˆ (He/Him) @ccjmk and anyone else who is currently working on modules that would interact with the Advancement process for a character (i.e. levelup)

I've created an issue to discuss some hooks that might be useful to implement as we work on the advancement UI and I would like your input:
It's just a nitpick, but I noticed that the hooks are PascalCase instead of the usual camelCase...
Looks good to me, I just left a comment on the related issue about how advancement will be resolved
If I understood the idea correctly, that might fall on a little pitfall I fell for last time hahah