866 add support for dual gps

[Matthew-Dobson]

This PR adds full support for dual-GPS telemetry by integrating the GPS2_RAW (ID 124) MAVLink message into the entire FGCS pipeline. The backend now registers and forwards GPS2_RAW alongside GPS_RAW_INT, the socket middleware handles and dispatches it, Redux stores it in a new gps2RawIntData slice, and the status bar displays the secondary GPS fix type when the data is present. This brings FGCS in line with ArduPilot’s dual-GPS capabilities and allows operators to see and verify secondary GPS status in both SITL and real dual-receiver setups.

[Copilot]

Pull request overview

This PR adds comprehensive support for dual GPS telemetry by integrating the GPS2_RAW MAVLink message (ID 124) throughout the FGCS stack. The implementation enables operators to monitor secondary GPS status in both SITL and real dual-receiver setups, aligning with ArduPilot's dual-GPS capabilities.

• Backend now registers and forwards GPS2_RAW messages alongside GPS_RAW_INT
• Redux state management includes a new gps2RawIntData slice with dedicated reducer and selectors
• Status bar UI conditionally displays secondary GPS fix type and satellite count when data is available

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
radio/app/endpoints/states.py	Adds GPS2_RAW to the dashboard message listeners for backend message forwarding
gcs/src/redux/slices/droneInfoSlice.js	Implements GPS2 state management with new gps2RawIntData initial state, setGps2RawIntData reducer, and selectGPS2RawInt selector
gcs/src/redux/middleware/socketMiddleware.js	Handles incoming GPS2_RAW messages and dispatches them to Redux store
gcs/src/components/dashboard/statusBar.jsx	Displays secondary GPS fix type and satellite count with IconSatellite when GPS2 data is present

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[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

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[1Blademaster]

Just one last change, rest looks good. Don't think we should calculate GPS tracking heading based on info from second GPS, only use the first GPS for that.