Added embedding API (#654)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Provider/Google/GoogleEmbeddingResponse.cs

@@ -0,0 +1,30 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace AIStudio.Provider.Google;
+
+public sealed record GoogleEmbeddingResponse
+{
+    [JsonConverter(typeof(GoogleEmbeddingListConverter))]
+    public List<GoogleEmbedding>? Embedding { get; init; }
+
+    private sealed class GoogleEmbeddingListConverter : JsonConverter<List<GoogleEmbedding>>
+    {
+        public override List<GoogleEmbedding> Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType == JsonTokenType.StartObject)
+            {
+                var single = JsonSerializer.Deserialize<GoogleEmbedding>(ref reader, options);
+                return single is null ? new() : new() { single };
+            }
+
+            if (reader.TokenType == JsonTokenType.StartArray)
+                return JsonSerializer.Deserialize<List<GoogleEmbedding>>(ref reader, options) ?? new();
+
+            throw new JsonException("Expected object or array for embedding.");
+        }
+
+        public override void Write(Utf8JsonWriter writer, List<GoogleEmbedding> value, JsonSerializerOptions options) =>
+            JsonSerializer.Serialize(writer, value, options);
+    }
+}