Add och!groups command

lib/utils.py

@@ -1,8 +1,17 @@
 from collections import AsyncIterable
-from typing import Callable, AsyncGenerator
+from typing import Callable, AsyncGenerator, Optional
+import discord
 
 
 async def async_filter(fun: Callable, iterable: AsyncIterable) -> AsyncGenerator:
     async for val in iterable:
         if fun(val):
             yield val
+
+
+def find_category(guild: discord.Guild, group: str) -> Optional[discord.CategoryChannel]:
+    group = group.lower()
+    for cat in guild.categories:
+        if cat.name.lower() == group:
+            return cat
+    return None