Add a grammar and spell checker assistant (#72)

app/MindWork AI Studio/Tools/JsRuntimeExtensions.cs

@@ -0,0 +1,11 @@
+using AIStudio.Components;
+
+namespace AIStudio.Tools;
+
+public static class JsRuntimeExtensions
+{
+    public static async Task GenerateAndShowDiff(this IJSRuntime jsRuntime, string text1, string text2)
+    {
+        await jsRuntime.InvokeVoidAsync("generateDiff", text1, text2, AssistantBase.ASSISTANT_RESULT_DIV_ID, AssistantBase.AFTER_RESULT_DIV_ID);
+    }
+}