Tab5 power expander driver and devicetree parsing improvements (#507)

* **New Features**
  * PI4IOE5V6408 I2C I/O expander driver with public GPIO APIs
  * CLI tool to list devicetree dependencies

* **Device Tree Updates**
  * M5Stack Tab5 configured with two I2C IO expanders; PI4IOE5V6408 binding added

* **Build / Tooling**
  * Devicetree code generation integrated into build; generated artifacts and dynamic dependency resolution exposed

* **Refactor**
  * Kernel/run APIs updated to accept a null‑terminated devicetree modules array; many module symbols renamed

* **Documentation**
  * Added README and Apache‑2.0 license for new driver module

Devices/simulator/CMakeLists.txt

@@ -5,20 +5,20 @@ if (NOT DEFINED ENV{ESP_IDF_VERSION})
     file(GLOB_RECURSE SOURCES "Source/*.c*")
     file(GLOB_RECURSE HEADERS "Source/*.h*")
 
-    add_library(Simulator OBJECT)
+    add_library(simulator OBJECT)
 
-    target_sources(Simulator
+    target_sources(simulator
         PRIVATE ${SOURCES}
         PUBLIC ${HEADERS}
     )
 
-    target_link_libraries(Simulator
+    target_link_libraries(simulator
         PRIVATE Tactility
         PRIVATE TactilityCore
         PRIVATE lvgl
         PRIVATE SDL2-static
     )
 
-    target_link_libraries(Simulator PRIVATE ${SDL2_LIBRARIES})
+    target_link_libraries(simulator PRIVATE ${SDL2_LIBRARIES})
 
 endif()

Devices/simulator/Source/module.cpp

@@ -12,8 +12,7 @@ static error_t stop() {
     return ERROR_NONE;
 }
 
-/** @warning The variable name must be exactly "device_module" */
-struct Module device_module = {
+struct Module simulator_module = {
     .name = "simulator",
     .start = start,
     .stop = stop,