app-module events & callstack config, crash diagnostics (#630)

- Apps can specify task stack depth and preferred memory placement in their manifests.
- App identifiers are validated against length and character requirements.
- Crash diagnostics now show the crash cause, reason, fault address, call stack, and program-counter details, with logs saved for review.
- App closing is more consistent across built-in screens. There's now a dedicated function, and the old _emit() function is made private.
- Crash diagnostics no longer display a QR code without a call stack.
- Improved memory allocation for unrestricted requests.

Tactility/Source/app/apphub/AppHubApp.cpp

@@ -51,8 +51,7 @@ void refresh(Context* ctx);
 
 void onBackPressed(lv_event_t* event) {
     auto* ctx = static_cast<Context*>(lv_event_get_user_data(event));
-    AppEvent closeEvent {.type = APP_EVENT_CLOSE, .timestamp = 0, .result = {}};
-    app_event_emit(ctx->appInstanceId, &closeEvent);
+    app_event_emit_close(ctx->appInstanceId);
 }
 
 void onAppPressed(lv_event_t* e) {