chore: import upstream snapshot with attribution

dotnet/samples/GettingStartedWithVectorStores/Glossary.cs

@@ -0,0 +1,30 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using Microsoft.Extensions.VectorData;
+
+namespace GettingStartedWithVectorStores;
+
+/// <summary>
+/// Sample model class that represents a glossary entry.
+/// </summary>
+/// <remarks>
+/// Note that each property is decorated with an attribute that specifies how the property should be treated by the vector store.
+/// This allows us to create a collection in the vector store and upsert and retrieve instances of this class without any further configuration.
+/// </remarks>
+internal sealed class Glossary
+{
+    [VectorStoreKey]
+    public string Key { get; set; }
+
+    [VectorStoreData(IsIndexed = true)]
+    public string Category { get; set; }
+
+    [VectorStoreData]
+    public string Term { get; set; }
+
+    [VectorStoreData]
+    public string Definition { get; set; }
+
+    [VectorStoreVector(Dimensions: 1536)]
+    public ReadOnlyMemory<float> DefinitionEmbedding { get; set; }
+}