SharedPtr: Implement make_shared using adopt_shared

luna/include/luna/SharedPtr.h

@@ -137,6 +137,12 @@ template <typename T> Result<SharedPtr<T>> adopt_shared(T* ptr)
     return SharedPtr<T> { ptr, ref_count };
 }
 
+template <typename T, class... Args> Result<SharedPtr<T>> make_shared(Args... args)
+{
+    T* raw_ptr = TRY(make<T>(args...));
+    return adopt_shared(raw_ptr);
+}
+
 template <typename T> Result<SharedPtr<T>> adopt_shared_if_nonnull(T* ptr)
 {
     if (ptr) return adopt_shared(ptr);