Generated the JSON contracts of providers, the runtime, and services at compile time (#1150)

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

@@ -92,16 +92,7 @@ public class ProviderGoogle() : BaseProvider(LLMProviders.GOOGLE, new Uri("https
             }
             
             // Prepare the Google Gemini embedding request:
-            var payload = new
-            {
-                content = new
-                {
-                    parts = texts.Select(text => new { text }).ToArray()
-                },
-                
-                taskType = "SEMANTIC_SIMILARITY"
-            };
-            
+            var payload = GoogleEmbeddingRequest.Of(texts);
             var embeddingRequest = JsonSerializer.Serialize(payload, JSON_SERIALIZER_OPTIONS);
             var embedUrl = $"https://generativelanguage.googleapis.com/v1beta/models/{modelName}:embedContent";
             using var request = new HttpRequestMessage(HttpMethod.Post, embedUrl);