GNSS improvments: - Introduce alive indicator; Status string will switch between white and grey with every message received from the module - shorten visibility of "shutting down" string. a busy wait of 1 second was applied in the sleep prepare function. The time is now included in the time needed to prepare the module for low power operation - make sure GPIO is properly initialized after deep sleep

--- a/Small_CPU/Inc/GNSS.h	Tue Dec 10 21:03:04 2024 +0100
+++ b/Small_CPU/Inc/GNSS.h	Thu Dec 12 21:12:07 2024 +0100
@@ -91,6 +91,8 @@
 	uint8_t numSat;
 	uint8_t statSat[4];
 
+	uint8_t alive;
+
 }GNSS_StateHandle;
 
 GNSS_StateHandle GNSS_Handle;