SSH Proxy 0.2.0

feat: ✨ Major improvements and fixes

🚀 Aggressive Connection Monitoring & Fast Reconnection
- Reduced connection health check interval to 10 seconds for quicker detection of connection issues.
- Implemented a more responsive reconnection mechanism.

🧪 "Test All Servers" & Latency Testing
- Added a "Test All Servers" feature to test the latency of all servers in the list.
- The test now establishes a real SSH tunnel and runs an HTTP latency test through it for more accurate results.
- The "Test Connection" button now works without an active VPN connection by performing a direct HTTP latency test.

🔑 Host Key Verification Fix
- Fixed an issue where SSH connections would fail due to host key changes.
- Implemented a custom `HostKeyVerifier` that automatically accepts new host keys to improve user experience.

🐛 Bug Fixes & UI Improvements
- Fixed an "Address already in use" error when testing all servers by using random ports for the local proxy.
- Improved the UI for displaying test results.
- The connection timer is now persistent across screen navigation.