Kernel improvements (#468)

* **New Features**
  * Plugin-style modules for platforms and devices with start/stop lifecycle and a runtime-consumable device tree array.

* **Refactor**
  * Consolidated initialization into a kernel/module startup flow.
  * Generated devicetree artifacts moved to the build Generated directory.

* **Changes**
  * Removed legacy no-op registration hooks and I2C lock/unlock wrappers.
  * Driver ownership and private state moved to explicit module/owner model.
  * Added ERROR_NOT_ALLOWED error code.

Platforms/PlatformEsp32/Source/drivers/esp32_gpio.cpp

@@ -107,6 +107,8 @@ const static GpioControllerApi esp32_gpio_api  = {
     .get_options = get_options
 };
 
+extern struct Module platform_module;
+
 Driver esp32_gpio_driver = {
     .name = "esp32_gpio",
     .compatible = (const char*[]) { "espressif,esp32-gpio", nullptr },
@@ -114,7 +116,8 @@ Driver esp32_gpio_driver = {
     .stopDevice = stop,
     .api =  (void*)&esp32_gpio_api,
     .deviceType = nullptr,
-    .internal = { 0 }
+    .owner = &platform_module,
+    .driver_private = nullptr
 };
 
 } // extern "C"