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.

Devices/lilygo-tlora-pager/Source/Drivers.cpp

@@ -1,10 +0,0 @@
-#include <tactility/driver.h>
-
-extern "C" {
-
-extern void register_device_drivers() {
-    extern Driver tlora_pager_driver;
-    driver_construct(&tlora_pager_driver);
-}
-
-}

Devices/lilygo-tlora-pager/Source/drivers/Register.cpp

@@ -1,10 +0,0 @@
-#include <tactility/driver.h>
-
-extern "C" {
-
-extern void register_device_drivers() {
-    extern Driver tlora_pager_driver;
-    driver_construct(&tlora_pager_driver);
-}
-
-}

Devices/lilygo-tlora-pager/Source/drivers/TloraPager.cpp

@@ -6,6 +6,8 @@
 
 extern "C" {
 
+extern struct Module device_module;
+
 static int start(Device* device) {
     return 0;
 }
@@ -21,7 +23,8 @@ Driver tlora_pager_driver = {
     .stopDevice = stop,
     .api = nullptr,
     .deviceType = nullptr,
-    .internal = { 0 }
+    .owner = &device_module,
+    .driver_private = nullptr
 };
 
 }

Devices/lilygo-tlora-pager/Source/module.cpp

@@ -0,0 +1,30 @@
+#include <tactility/check.h>
+#include <tactility/driver.h>
+#include <tactility/module.h>
+
+extern "C" {
+
+extern Driver tlora_pager_driver;
+
+static error_t start() {
+    /* We crash when construct fails, because if a single driver fails to construct,
+     * there is no guarantee that the previously constructed drivers can be destroyed */
+    check(driver_construct(&tlora_pager_driver) == ERROR_NONE);
+    return ERROR_NONE;
+}
+
+static error_t stop() {
+    /* We crash when destruct fails, because if a single driver fails to destruct,
+     * there is no guarantee that the previously destroyed drivers can be recovered */
+    check(driver_destruct(&tlora_pager_driver) == ERROR_NONE);
+    return ERROR_NONE;
+}
+
+/** @warning The variable name must be exactly "device_module" */
+struct Module device_module = {
+    .name = "LilyGO T-Lora Pager",
+    .start = start,
+    .stop = stop
+};
+
+}