Fix some smells.

main.py

@@ -1,11 +1,12 @@
 """Main file for bot."""
 
 import logging
-import os
+import pathlib
 
 import nextcord
 from nextcord.ext import commands
 
+from logger import ocd_logger
 from settings import settings
 
 nextcord_logger = logging.getLogger("nextcord")
@@ -33,16 +34,16 @@ def main() -> None:
     bot = commands.Bot(intents=intents)
 
     # Get the modules of all cogs whose directory structure is ./cogs/<module_name>
-    for folder in os.listdir("cogs"):
+    for folder in pathlib.Path("cogs").iterdir():
         bot.load_extension(f"cogs.{folder}")
 
     @bot.listen()
     async def on_ready() -> None:
         """When Discord is connected."""
         if bot.user is None:
-            print("Discord connection failed.")
+            ocd_logger.critical("Discord connection failed.")
             return
-        print(f"{bot.user.name} has connected to Discord!")
+        ocd_logger.info(f"{bot.user.name} has connected to Discord!")
 
     # Run Discord bot
     bot.run(settings.params.discord_token)