Refactor LVGL code into kernel module (#472)

* **New Features**
  * Added a standalone LVGL module and enabled LVGL support in the simulator for richer local UI testing.

* **Refactor**
  * HAL and LVGL split into distinct modules; startup and device attach/detach flows reorganized for clearer lifecycle management.
  * Public APIs tightened with clearer nullability/documentation.

* **Bug Fixes**
  * More consistent LVGL start/stop and device attach/detach behavior for improved stability.

TactilityCore/Source/file/File.cpp

@@ -92,8 +92,8 @@ bool listDirectory(
 int scandir(
     const std::string& path,
     std::vector<dirent>& outList,
-    ScandirFilter _Nullable filterMethod,
-    ScandirSort _Nullable sortMethod
+    ScandirFilter filterMethod,
+    ScandirSort sortMethod
 ) {
     auto lock = getLock(path)->asScopedLock();
     lock.lock();