Various fixes and improvements (#177)

- Remove custom `ESP_TARGET` and use `ESP_PLATFORM` everywhere
- Add `Loader` service functionality to `tt::app::` namespace
- Make `Loader` `PubSub` usable by exposing the messages
- Add board type to crash log
- Don't show SD card in Files app when it's not mounted
- Set default SPI frequency for SD cards
- Move TT_VERSION to scope that works for sim too
- Log Tactility version and board on boot
- Rename "Yellow Board" to "CYD 2432S024C"

TactilityHeadless/Source/TactilityHeadless.cpp

@@ -38,6 +38,7 @@ static void register_and_start_system_services() {
 }
 
 void initHeadless(const hal::Configuration& config) {
+    TT_LOG_I(TAG, "Tactility v%s on %s (%s)", TT_VERSION, CONFIG_TT_BOARD_NAME, CONFIG_TT_BOARD_ID);
 #ifdef ESP_PLATFORM
     initEsp();
 #endif