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/service/loader/Loader.cpp

@@ -245,7 +245,7 @@ void LoaderService::transitionAppToState(const std::shared_ptr<app::AppInstance>
     switch (state) {
         using enum app::State;
         case Initial:
-            tt_crash(LOG_MESSAGE_ILLEGAL_STATE);
+            check(false, LOG_MESSAGE_ILLEGAL_STATE);
         case Created:
             assert(app->getState() == app::State::Initial);
             app->getApp()->onCreate(*app);