Initial commit: Cross-platform email migration script

- Add Python script for IMAP-to-IMAP email migration
- Support for preserving folder structure, flags, and dates
- Configurable via environment variables (.env file)
- Batch processing with progress reporting and error handling
- SSL/TLS support for secure connections
- Folder filtering capabilities (include/exclude)
- Comprehensive logging system
- Works natively on Linux and macOS without dependencies
- Include .env.template for easy setup
- Add comprehensive README with setup instructions

.gitignore

@@ -0,0 +1,23 @@
+# Temporary files
+temp_emails/
+*.log
+
+# Environment files with credentials
+.env
+
+# Python cache
+__pycache__/
+*.pyc
+*.pyo
+
+# IDE files
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# macOS
+.DS_Store
+
+# Test files
+test_*.py