Adds static analysis for CK3 mod files using ck3-tiger. The Makefile
downloads the platform-specific binary and persists the CK3 game
directory path for validation runs.
Targets: make setup, make lint, make clean
Config: lords_of_ash/ck3-tiger.conf (English only, hide vanilla)
Commit skill updated with pre-commit lint step.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
