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.

TactilityKernel/Source/kernel_init.cpp

@@ -23,7 +23,8 @@ struct Module root_module = {
     .name = "kernel",
     .start = start,
     .stop = stop,
-    .symbols = (const struct ModuleSymbol*)KERNEL_SYMBOLS
+    .symbols = (const struct ModuleSymbol*)KERNEL_SYMBOLS,
+    .internal = nullptr
 };
 
 error_t kernel_init(struct Module* platform_module, struct Module* device_module, struct CompatibleDevice devicetree_devices[]) {