Host metrics (#6817)

* Add std::string exec() function to PortduinoGlue for future work

* MVP for HostMetrics module.

* Fix compilation for other targets

* Remove extra debug calls

* Big numbers don't do well as INTs.

* Add HostMetrics to config.yaml

src/modules/Modules.cpp

@@ -49,6 +49,7 @@
 #endif
 #if ARCH_PORTDUINO
 #include "input/LinuxInputImpl.h"
+#include "modules/Telemetry/HostMetrics.h"
 #if !MESHTASTIC_EXCLUDE_STOREFORWARD
 #include "modules/StoreForwardModule.h"
 #endif
@@ -196,6 +197,9 @@ void setupModules()
 #if HAS_SCREEN && !MESHTASTIC_EXCLUDE_CANNEDMESSAGES
         cannedMessageModule = new CannedMessageModule();
 #endif
+#if ARCH_PORTDUINO
+        new HostMetricsModule();
+#endif
 #if HAS_TELEMETRY
         new DeviceTelemetryModule();
 #endif