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.

Tests/Tactility/CMakeLists.txt

@@ -7,9 +7,6 @@ set(CMAKE_CXX_COMPILER g++)
 file(GLOB_RECURSE TEST_SOURCES ${PROJECT_SOURCE_DIR}/*.cpp)
 add_executable(TactilityTests EXCLUDE_FROM_ALL ${TEST_SOURCES})
 
-add_definitions(-D_Nullable=)
-add_definitions(-D_Nonnull=)
-
 target_include_directories(TactilityTests PRIVATE
     ${DOCTESTINC}
 )
@@ -23,7 +20,8 @@ target_link_libraries(TactilityTests PRIVATE
     TactilityCore
     TactilityKernel
     PlatformPosix
-    hal-device
-    Simulator
+    hal-device-module
+    lvgl-module
+    lvgl
     SDL2::SDL2-static SDL2-static
 )