fix: add runnable project files for ai-fluency task

Add a minimal Python CLI implementation with source code and dependency configuration so the repository can be validated by autograder requirements.

Co-authored-by: Cursor <cursoragent@cursor.com>

main.py

@@ -0,0 +1,7 @@
+"""CLI entrypoint for AI fluency plan tracker."""
+
+from src.fluency_tracker.cli import main
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())