Add template-based system for generating personalized brevet cards
from CSV data. Uses proper separation of concerns with template file
and Python script.
- Add brevetkarte-template.tex with placeholders
- Add generate_cards.py to read CSV and populate template
- Update Makefile with generate-personalized and build-personalized targets
- Update .gitignore to exclude generated files
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
