feat: initial dashboard implementation and robust attendance parsing

- Added a Makefile to easily run project scripts (fees, match, web, image)
- Modified attendance.py to dynamically handle a variable number of header rows from the Google Sheet
- Updated both attendance calculations and calculate_fees terminal output to show actual attendance counts (e.g., '750 CZK (3)')
- Created a Flask web dashboard (app.py and templates/fees.html) to view member fees in an attractive, condensed, terminal-like UI
- Bound the Flask server to port 5000 and added a routing alias from '/' to '/fees'
- Configured Python virtual environment (.venv) creation directly into the Makefile to resolve global pip install errors on macOS

Co-authored-by: Antigravity <antigravity@deepmind.com>

.gitignore

@@ -0,0 +1,2 @@
+# python cache
+**/*.pyc