feat(cli): add command line interface for Tux Discord Bot

- Introduced a new CLI module that serves as the entry point for running the Tux Discord Bot.
- Implemented the main function to facilitate bot execution via command line.
- Added documentation to describe the purpose and functionality of the CLI module.

Author: kzndotsh

src/tux/cli.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python3
+"""
+Command Line Interface for Tux Discord Bot.
+
+This module provides the CLI entry point for running the bot.
+"""
+
+import sys
+
+from tux.main import run
+
+
+def main():
+    """Entry point for the Tux CLI."""
+    sys.exit(run())
+
+
+if __name__ == "__main__":
+    main()