Add .gitignore for Claude Project documentation workflow

.gitignore

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+# System files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Editor files
+*.swp
+*.swo
+*~
+.vscode/
+.idea/
+*.sublime-*
+
+# Temporary files
+*.tmp
+*.temp
+*.log
+*.bak
+*.backup
+
+# Personal notes (keep private)
+personal-notes/
+private/
+.personal/
+
+# Large files that shouldn't be in git
+*.zip
+*.tar.gz
+*.rar
+knowledge-base/**/*.zip
+knowledge-base/**/*.pdf
+
+# Generated documentation
+docs/generated/
+knowledge-base/compiled/
+
+# Cache directories
+.cache/
+node_modules/