feat(n8n): add Car Detailing Daily Email Campaign workflow with Google Sheets and templated emailing

.gitignore

@@ -0,0 +1,137 @@
+# macOS
+.DS_Store
+.AppleDouble
+.LSOverride
+Icon
+._*
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+# Windows
+Thumbs.db
+ehthumbs.db
+Desktop.ini
+$RECYCLE.BIN/
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+*.lnk
+
+# Linux
+*~
+.fuse_hidden*
+.directory
+.Trash-*
+.nfs*
+
+# Editors & IDEs
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+*.sublime-project
+
+# n8n
+.n8n/
+n8n.db
+encryption.key
+config/
+
+# Logs
+logs/
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Environment variables
+.env
+.env.local
+.env.*.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# Node modules
+node_modules/
+jspm_packages/
+
+# Build outputs
+dist/
+build/
+*.bundle.js
+
+# Credentials & sensitive data
+credentials.json
+*.key
+*.pem
+*.p12
+*.pfx
+secrets/
+private/
+
+# Temporary files
+tmp/
+temp/
+*.tmp
+*.temp
+*.cache
+
+# Arduino
+*.hex
+*.eep
+*.elf
+*.map
+
+# Backup files
+*.bak
+*.backup
+*_backup
+*.old
+
+# Archives
+*.zip
+*.tar
+*.tar.gz
+*.rar
+*.7z
+
+# Test coverage
+coverage/
+*.lcov
+.nyc_output
+
+# Database
+*.db
+*.sqlite
+*.sqlite3
+
+# CSV data (keep templates, ignore user data)
+# Uncomment below to ignore all CSV files except templates
+# *.csv
+# !sample_*.csv
+# !template_*.csv