Hey, I don't think this would be necessary as the only roles members can get are their linked Minecraft accounts (Java and/or Bedrock), in-game ranks (for Java) and VIP level (for Bedrock). You can get these roles by linking your discord account and Minecraft account to your forums account by following
these instructions.
Besides in-game rank roles there's of course staff roles on which you can find more info in
this thread.
Naturally, the perks of the in-game Java ranks are mentioned on
store.cubecraft.net. You can find more info about VIP levels in
this help article.
As you can see, all info about roles and ranks is already out there, and I don't feel like a Discord channel is the place to put all of this information in.