Add ability to delete groups

bot.py

@@ -415,6 +415,28 @@ async def group_command(ctx: commands.Context, subcommand: Optional[str], arg: O
 
         else:
             await ctx.send("Can't find that group!")
+    elif subcommand == 'delete':
+        if arg is None:
+            await ctx.send("Group name required!")
+            return
+
+        groups = collect_group_channels(groups_cat)
+        archive_cat = find_category(guild, config_get("groups-archive-category", guild.id))
+        if archive_cat is None:
+            await fail_category("archive", config_get("groups-archive-category", guild.id))
+            return
+
+        active_groups = collect_group_channels(groups_cat)
+        archive_groups = collect_group_channels(archive_cat)
+
+        role = guild.get_role(config_get("groups-role-prefix", guild.id))
+        if role is not None:
+            await role.delete(reason="Delete group " + arg)
+
+        if arg in active_groups:
+            await active_groups[arg].delete(reason="Delete group " + arg)
+        if arg in archive_groups:
+            await archive_groups[arg].delete(reason="Delete group " + arg)
     elif subcommand == 'create':
         if arg is None:
             await ctx.send("Group name required!")