Simplify app registration with TactilityCpp (#7)

- Simplified app registration with a C++ wrapper for the TactilityC.
- Rename the various app classes from `Application` to more specific names like `Calculator` etc.

Apps/Diceware/main/Source/main.cpp

@@ -1,31 +1,10 @@
-#include <tt_app.h>
-#include "Application.h"
-
-static void onShowApp(AppHandle appHandle, void* data, lv_obj_t* parent) {
-    static_cast<Application*>(data)->onShow(appHandle, parent);
-}
-
-static void onHideApp(AppHandle appHandle, void* data) {
-    static_cast<Application*>(data)->onHide(appHandle);
-}
-
-static void* createAppData() {
-    return new Application();
-}
-
-static void destroyAppData(void* app) {
-    delete static_cast<Application*>(app);
-}
+#include "Diceware.h"
+#include <TactilityCpp/App.h>
 
 extern "C" {
 
 int main(int argc, char* argv[]) {
-    tt_app_register((AppRegistration) {
-        .createData = createAppData,
-        .destroyData = destroyAppData,
-        .onShow = onShowApp,
-        .onHide = onHideApp,
-    });
+    registerApp<Diceware>();
     return 0;
 }