Various improvements (#461)

* **New Features**
  * Time and delay utilities added (ticks, ms, µs); SD card now uses an expansion-header CS pin; HTTP downloads warn when run on the GUI task and yield to avoid blocking.

* **Bug Fixes / Reliability**
  * Many hard-crash paths converted to guarded checks to reduce abrupt termination and improve stability.

* **Tests**
  * Unit tests added to validate time and delay accuracy.

* **Chores**
  * License header and build/macro updates.

Tactility/Source/app/crashdiagnostics/CrashDiagnostics.cpp

@@ -17,7 +17,7 @@ static const auto LOGGER = Logger("CrashDiagnostics");
 
 extern const AppManifest manifest;
 
-void onContinuePressed(TT_UNUSED lv_event_t* event) {
+void onContinuePressed(lv_event_t* event) {
     stop(manifest.appId);
     launcher::start();
 }