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"

App/CMakeLists.txt

@@ -5,7 +5,7 @@ if (DEFINED ENV{ESP_IDF_VERSION})
 
     if("${IDF_TARGET}" STREQUAL "esp32")
         list(APPEND BOARD_COMPONENTS
-            YellowBoard
+            CYD-2432S024C
             M5stackCore2
         )
     endif()