Windows fixes

• Implement take_ax_snapshot on Windows — added collect_uia_tree using UI Automation, enabling accessibility tree snapshots on Windows (previously macOS-only)
• Map all 41 UIA control types — take_ax_snapshot now correctly identifies all standard Windows control types (buttons, tabs, menus, data grids, semantic elements, etc.) instead of falling back to "Unknown"

Other

• Shorten server.json description to meet MCP registry 100-char limit