Update Oracle with Server Roles

[ZuliusRoolf]

This pull request includes several updates to the ORACLE.md file, which documents the Discord server structure and roles. The changes include adding the roles, defining their display settings, adding role permissions, and fixing formatting.

[andreas-bauer]

What problem does this level of detail (complexity) try to solve?
E.g., roles per study year or miscellaneous roles.

You can do it this way if you think people will follow the detailed roles.

[ZuliusRoolf]

What problem does this level of detail (complexity) try to solve? E.g., roles per study year or miscellaneous roles.

You can do it this way if you think people will follow the detailed roles.

You are right, I had a vision that maybe old members (students who is inactive and doesn't even live in Karlskrona anymore) could be filtered out this way. But in the grand scheme of things the discord is about the lab and not the studies. I created issue #15 that could replace the "miscellaneous" category with "groups" or "hobbies". I'll update the pull-request so that it reflects the roles, then we need to decide on how these hobby groups should be accessed in issue #15.