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.

Modules/app-module/source/internal_loader.cpp

@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: Apache-2.0
 #include <app/loader.h>
-#include <app/manifest.h>
 
 #include <service/instance.h>
 #include <service/manager.h>
@@ -24,10 +23,15 @@ int32_t api_run(AppRuntime runtime, uint32_t /*app_instance_id*/, int argc, char
 void api_unload(AppRuntime /*unused*/) {
 }
 
+bool api_is_executable(AppLocation location) {
+    return location.type == APP_LOCATION_MEMORY && location.location != nullptr;
+}
+
 AppLoaderApi memory_loader_api = {
     .load = api_load,
     .run = api_run,
     .unload = api_unload,
+    .is_executable = api_is_executable,
 };
 
 void* create_service(const ServiceManifest*) {