Add .gitignore and clean up tracked artifacts

- Added comprehensive .gitignore for Hugo projects
- Includes exclusions for Claude Code directories
- Removed public/ and .hugo_build.lock from tracking
- These files will be rebuilt during CI/CD

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,46 @@
+# Hugo build artifacts
+/public/
+/resources/
+.hugo_build.lock
+
+# Temporary files
+*.tmp
+*.temp
+*~
+.DS_Store
+Thumbs.db
+
+# Editor files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Node.js (if using npm/yarn for asset processing)
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Environment files
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# Hugo cache
+/.hugo_build.lock
+
+# Claude Code directories
+.claude/