Run executables directly (#645)

- Apps can be launched directly from file paths (including Files app support)
- Added executable detection to identify unsupported or invalid binaries before launch.
- App startup is now streamlined through separate registered-app and direct-execution interfaces.
- Existing app launch points were migrated to the updated startup APIs.

Tactility/Source/app/applist/AppList.cpp

@@ -1,5 +1,6 @@
 #include <app/event.h>
 #include <app/manager.h>
+#include <app/start.h>
 #include <app/manifest.h>
 #include <app/scheduler.h>
 
@@ -28,7 +29,7 @@ void onAppPressed(lv_event_t* e) {
     // Fire-and-forget top-level navigation, same as Launcher's own app-launch buttons.
     const auto* manifest = static_cast<const ::AppManifest*>(lv_event_get_user_data(e));
     uint32_t instanceId = 0;
-    app_manager_start(manifest->id, &instanceId);
+    app_start(manifest->id, 0, nullptr, &instanceId);
 }
 
 void onBackPressed(lv_event_t* event) {