Add the ability to auto-scale channel creation

[Skelmis]

Is your feature request related to a problem? Please describe.
Discord limits a max of 50 channels per category, this isn't an issue for small stuff but comes to the forefront at scale.

Describe the solution you'd like
When the main category is at the max channels, we do the following:

• Check if we already have a backup category and if so use that.
• Create a new category mirroring the current one, and persist that info

This would be recursive, to allow for in theory up to 500 channels. The max for a guild.

Additional context
A downstream user reported this.