chore: add license block

VContainer/Assets/VContainer/Runtime/Annotations/AwaitableExtensions.cs

@@ -1,3 +1,26 @@
+//
+// Copyright (c) 2024 left (https://github.com/left-/)
+// Copyright (c) 2020 hadashiA
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+
 #if UNITY_2021_3_OR_NEWER
 using System;
 #if UNITY_2023_1_OR_NEWER
@@ -6,7 +29,6 @@
 using Awaitable = System.Threading.Tasks.Task;
 #endif
 
-
 namespace VContainer.Unity
 {
     internal static class AwaitableExtensions