Merge TactilityHeadless into Tactility (#263)

There currently is no practical use to have TactilityHeadless as a subproject. I'm merging it with the Tactility project.

Tactility/Source/hal/sdcard/SdCard.cpp

@@ -0,0 +1,17 @@
+#include "Tactility/hal/Device.h"
+#include "Tactility/hal/sdcard/SdCardDevice.h"
+
+namespace tt::hal::sdcard {
+
+std::shared_ptr<SdCardDevice> _Nullable find(const std::string& path) {
+    auto sdcards = findDevices<SdCardDevice>(Device::Type::SdCard);
+    for (auto& sdcard : sdcards) {
+        if (sdcard->isMounted() && path.starts_with(sdcard->getMountPath())) {
+            return sdcard;
+        }
+    }
+
+    return nullptr;
+}
+
+}