created ServiceManifest (#5)

based on AppManifest

main/src/hello_world/hello_world.c

@@ -1,6 +1,6 @@
 #include "hello_world.h"
-#include "apps/services/gui/gui.h"
-#include "apps/services/loader/loader.h"
+#include "services/gui/gui.h"
+#include "services/loader/loader.h"
 
 static void app_show(lv_obj_t* parent, void* context) {
     UNUSED(context);

main/src/main.c

@@ -8,9 +8,12 @@ __attribute__((unused)) void app_main(void) {
     static const Config config = {
         .hardware = NB_BOARD_HARDWARE,
         .apps = {
-            &hello_world_app
+            &hello_world_app,
+            NULL // NULL terminator - do not remove
+        },
+        .services = {
+            NULL // NULL terminator - do not remove
         },
-        .apps_count = 1
     };
 
     nanobake_start(&config);