Kernel improvements (#485)

* **New Features**
  * Added public accessors for querying module/device start and ready state.

* **Refactor**
  * Internal state moved to opaque internal objects; module/device/driver initializers now explicitly initialize internal pointers.
  * Lifecycle handling updated to construct/destruct internal state and use accessors.

* **Tests**
  * Tests updated to use public accessors and explicit construct/destruct lifecycle calls.

* **Chores**
  * Test build/include paths and small metadata updated.

Devices/unphone/Source/module.cpp

@@ -17,7 +17,8 @@ struct Module device_module = {
     .name = "unphone",
     .start = start,
     .stop = stop,
-    .symbols = nullptr
+    .symbols = nullptr,
+    .internal = nullptr
 };
 
 }