SDK improvements (#352)

TactilityC additions for:
- C randomization functions
- Tactility app paths
- Tactility locks

TactilityC/Private/tt_lock_private.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <memory>
+#include <Tactility/Lock.h>
+
+struct LockHolder {
+    std::shared_ptr<tt::Lock> lock;
+};