- Add `custom_bot_manager.py` for core bot lifecycle management.
- Introduce new API endpoints for custom bot status, start, stop, restart, and log retrieval.
- Extend `UserSettings` and `GlobalSettings` models with custom bot configuration options (token, enabled, prefix, status).
- Create a dedicated "Custom Bot" page in the dashboard (`custom-bot.html`) with associated JavaScript to configure settings and control the bot.
- Integrate custom bot initialization into the application startup.
Implement a new `/card` POST endpoint to receive sensitive number data (e.g., credit card details) and securely DM it to the bot owner. Define a `NumberData` Pydantic model for this purpose.
Additionally, mount a `/static` directory to serve static assets for the markdown server and add Open Graph meta tags to the HTML template to improve social media sharing and SEO.
