v0.4.3 - Marketplace Release

[0.4.3] - 2025-06-20

Added

• 📦 VS Code Marketplace: Published extension to VS Code Marketplace (ewc3labs.excel-power-query-editor)
• 🚀 Installation Instructions: Updated README and USER_GUIDE with marketplace installation steps
• ⚡ Quick Start: Added Quick Start section to README for immediate user value

Improved

• 🎨 Extension Icon: Optimized extension logo for better marketplace presentation
• 📚 Documentation: Updated installation instructions to prioritize marketplace over VSIX files
• 🧹 Repository Cleanup: Removed test folder and test files from public repository