Refactor bot and use cogs

Dockerfile

@@ -1,6 +1,6 @@
 FROM python:3.12-alpine
 
-WORKDIR /app
+WORKDIR /src
 
 COPY requirements.txt requirements.txt
 RUN /usr/local/bin/python -m pip install --upgrade pip
@@ -12,4 +12,4 @@ COPY ./src/ .
 RUN mkdir -p ./data/log
 RUN mkdir -p ./data/config
 
-CMD [ "python3.12", "main.py" ]
+CMD [ "python3.12", "bot.py" ]