Add settings/modes to name normalization #47
Description
It would be preferable for users to be able to opt-in to harsher (or less harsh) filtering methods for the name normalization feature.
For example, an english-speaking community may want to restrict names to only ASCII.
This feature calls for a proper settings system though, as we likely don't want to shove everything in the guild_settings table when more and more options are added for the diverse set of guild-level features.