Added support for DateTimeOffset keys

Author: javiercn

src/Components/Components/src/SupplyParameterFromPersistentComponentStateValueProvider.cs

@@ -262,6 +262,7 @@ private static bool IsSerializableKey(object key)
         var keyType = key.GetType();
         var result = Type.GetTypeCode(keyType) != TypeCode.Object
             || keyType == typeof(Guid)
+            || keyType == typeof(DateTimeOffset)
             || keyType == typeof(DateOnly)
             || keyType == typeof(TimeOnly);
 

src/Components/Components/test/SupplyParameterFromPersistentComponentStateValueProviderTests.cs

@@ -228,6 +228,7 @@ public async Task PersistAsync_CanPersistMultipleComponentsOfSameType_WhenParent
         { Math.PI, -Math.PI },
         { 123456.789m, -123456.789m },
         { new DateTime(2023, 1, 1), new DateTime(2023, 12, 31) },
+        { new DateTimeOffset(2023, 1, 1, 0, 0, 0, TimeSpan.FromSeconds(0)), new DateTimeOffset(2023, 12, 31, 0, 0, 0, TimeSpan.FromSeconds(0)) },
         { "key1", "key2" },
         // Include a very long key to validate logic around growing buffers
         { new string('a', 10000), new string('b', 10000) },