add support tcp mode

[iwizard7]

1. TCP/SSH Monitoring Support
   New Provider: Implemented TCPMonitorProvider using Network.framework for efficient port checking.
   UI Integration: Added a new "TCP / SSH" section in the settings to allow monitoring specific hosts and ports (defaulting to 22 for SSH).
   Strict Handshake Mode: Added a "Verify Service Handshake" feature that waits for server data (like an SSH banner) to filter out "black hole" ports or silent proxies.
2. CI/CD & Automation
   Automatic Releases: Created a GitHub Actions workflow that automatically builds the macOS app, packages it into a .dmg, and creates a new GitHub Release on every push to the main branch.
   Build Optimization: Configured the build process to work without requiring private Apple Developer certificates for quick CI turnaround.
3. Security & Networking Fixes
   Sandbox Entitlements: Added the com.apple.security.network.client entitlement to allow the app to make outgoing connections from the macOS sandbox.
   HTTP Cleartext Support: Configured App Transport Security (ATS) exceptions in Info.plist to allow monitoring of insecure http:// services (often used for internal/private UIs).
4. Stability & Performance
   Swift 6 Concurrency: Resolved several build errors and warnings related to strict concurrency and data race safety in the monitoring engine.
   Robust Polling: Updated the monitoring logic to handle various network states (like .waiting or .failed) more accurately to avoid false status reports.
5. Visual Polish
   App Icon Restoration: Recovered the official high-resolution application icon from the project resources and correctly linked it to the macOS application target.
   UX Improvements: Added helpful tooltips and validation logic to the monitor configuration screen.

[jsattler]

@iwizard7 many thanks for your contribution. I'm going to review the changes in the coming days and it should be part of the next release.