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"

Boards/CYD-2432S024C/Source/hal/YellowSdCard.cpp

@@ -0,0 +1,29 @@
+#include "YellowSdCard.h"
+
+#define TAG "twodotfour_sdcard"
+
+#include "lvgl/LvglSync.h"
+#include "hal/SpiSdCard.h"
+
+#define SDCARD_SPI_HOST SPI3_HOST
+#define SDCARD_PIN_CS GPIO_NUM_5
+
+std::shared_ptr<SdCard> createYellowSdCard() {
+    auto* configuration = new tt::hal::SpiSdCard::Config(
+        SDCARD_PIN_CS,
+        GPIO_NUM_NC,
+        GPIO_NUM_NC,
+        GPIO_NUM_NC,
+        SdCard::MountBehaviour::AtBoot,
+        nullptr,
+        std::vector<gpio_num_t>(),
+        SDCARD_SPI_HOST
+    );
+
+    auto* sdcard = (SdCard*) new SpiSdCard(
+        std::unique_ptr<SpiSdCard::Config>(configuration)
+    );
+
+    return std::shared_ptr<SdCard>(sdcard);
+}
+