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/CMakeLists.txt

@@ -23,9 +23,6 @@ else()
 
     target_include_directories(TactilityCore PUBLIC Include/)
 
-    add_definitions(-D_Nullable=)
-    add_definitions(-D_Nonnull=)
-
     target_link_libraries(TactilityCore PUBLIC
         TactilityFreeRtos
         TactilityKernel

TactilityCore/Include/Tactility/file/File.h

@@ -151,15 +151,15 @@ bool listDirectory(
  *
  * @param[in] path path the scan for files and directories
  * @param[out] outList a pointer to vector of dirent
- * @param[in] filter an optional filter to filter out specific items
- * @param[in] sort an optional sorting function
+ * @param[in] filter an optional filter to filter out specific items (nullable)
+ * @param[in] sort an optional sorting function (nullable)
  * @return the amount of items that were stored in "output" or -1 when an error occurred
  */
 int scandir(
     const std::string& path,
     std::vector<dirent>& outList,
-    ScandirFilter _Nullable filter = nullptr,
-    ScandirSort _Nullable sort = nullptr
+    ScandirFilter filter = nullptr,
+    ScandirSort sort = nullptr
 );
 
 bool readLines(const std::string& filePath, bool stripNewLine, std::function<void(const char* line)> callback);

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();