Swap data provider (again)

[sudojunior]

There appears to be problems with how removal of custom commands function in the backend. Registering the command itself is fine, but the coroutine freezes before it reaches a logging step. Redis is a reasonable contender given that there is only one data model and they can be given prefixes to find them later on (either by absolute or wildcard query).

I'm not too concerned about performance or scalability at this stage, considering it is closer to an R&D project in how guild slash commands and autocomplete options could be used.