NTRIP Implementation (#13634)

* Add NTRIP support for GPS corrections

During the rebase(NTRIP Implementation from @KnightHawk06), the upstream contributor introduced changes that broke the previous design of NTRIPTCPLink inheriting from QThread. The class no longer implemented valid QThread behavior, which caused build errors such as:

illegal member initialization: 'QThread' is not a base or member

QObject::connect: no matching signal/slot overload

Missing methods (isRunning(), wait(), quit(), run(), exec())

and at runtime triggered Qt warnings about QSocketNotifier and thread affinity.

This patch converts NTRIPTCPLink from a QThread subclass into a proper QObject worker and runs it inside a dedicated QThread created and owned by NTRIPManager. This follows the recommended Qt threading pattern and fixes the build-time and runtime issues.

Key changes:

Replace NTRIPTCPLink : QThread with NTRIPTCPLink : QObject

Move socket and parser lifetime fully into the worker thread

Add a start() slot instead of overriding run()

Use requestStop() + finished signal to cleanly shut down the worker

Update NTRIPManager to own the QThread and manage start/stop correctly

Remove invalid QThread API calls from NTRIPTCPLink

Eliminate race conditions and invalid cross-thread socket access

Testing:

Build-only verification on Windows (VS2022 + Qt 6.10).

Connected to rtk2go with a nearby base station in SITL/simulator; verified NTRIP connection and RTCM data flow.

No real vehicle available at the moment, so end-to-end RTK injection into an actual autopilot is not re-tested.

Previously used successfully with the Turkish NTRIP caster TUSAGA-Aktif; current changes are expected to preserve functionality once a real vehicle + caster are available.

Co-Authored-By: KnightHawk06 <[email protected]>

* remove unrelated file

Co-Authored-By: KnightHawk06 <[email protected]>

---------

Co-authored-by: KnightHawk06 <[email protected]>

Author: olmpya12

qgcresources.qrc

@@ -115,4 +115,11 @@
         <file alias="gcscontrol_gcs.svg">resources/gcscontrolIndicator/gcscontrol_gcs.svg</file>
         <file alias="gcscontrol_line.svg">resources/gcscontrolIndicator/gcscontrol_line.svg</file>
     </qresource>
-</RCC>
+        <qresource prefix="/qml">
+        <file alias="QGroundControl/AppSettings/NTRIPSettings.qml">src/UI/AppSettings/NTRIPSettings.qml</file>
+        <file alias="NTRIPSettings.qml">src/UI/AppSettings/NTRIPSettings.qml</file>
+    </qresource>  
+    <qresource prefix="/json">
+        <file alias="NTRIP.SettingsGroup.json">src/Settings/NTRIP.SettingsGroup.json</file>
+    </qresource>
+</RCC>

src/GPS/CMakeLists.txt

@@ -18,6 +18,8 @@ target_sources(${CMAKE_PROJECT_NAME}
         GPSRtk.h
         GPSRTKFactGroup.cc
         GPSRTKFactGroup.h
+        NTRIP.cc
+        NTRIP.h
         RTCMMavlink.cc
         RTCMMavlink.h
         satellite_info.h