created ServiceManifest (#5)

based on AppManifest

components/furi/src/service_manifest.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include <stdio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef void (*ServiceOnStart)(void _Nonnull* parameter);
+typedef void (*ServiceOnStop)();
+
+typedef struct {
+    /**
+     * The identifier by which the app is launched by the system and other apps.
+     */
+    const char* _Nonnull id;
+
+    /**
+     * Non-blocking method to call when service is started.
+     */
+    const ServiceOnStart _Nullable on_start;
+
+    /**
+     * Non-blocking method to call when service is stopped.
+     */
+    const ServiceOnStop _Nullable on_stop;
+
+} ServiceManifest;
+
+#ifdef __cplusplus
+}
+#endif