Move the model kinds into the rule engine

app/MindWork AI Studio/Models/Kinds/ImageGenerationModelsFamily.cs

@@ -0,0 +1,39 @@
+using AIStudio.Provider;
+
+namespace AIStudio.Models.Kinds;
+
+/// <summary>
+/// The models which draw rather than write.
+/// </summary>
+/// <remarks>
+/// Google names its image models after the chat model they grew out of and appends the word:
+/// gemini-3-pro-image, gemini-3.1-flash-image, gemini-2.5-flash-image. Read as a plain substring
+/// that word is far too greedy -- it sits inside "imagenet" and "reimagined" as well, and a chat
+/// model carrying such a word would disappear from the user's list. As a name part it says what it
+/// is meant to say, and it covers OpenAI's gpt-image-1 along the way, which is why that name is not
+/// stated a second time.
+/// </remarks>
+public sealed class ImageGenerationModelsFamily : ModelFamily
+{
+    /// <inheritdoc />
+    public override ModelVendor Vendor => ModelVendor.UNKNOWN;
+
+    /// <inheritdoc />
+    public override ModelSource Source => new("https://huggingface.co/models?pipeline_tag=text-to-image", new DateOnly(2026, 9, 12), "Ported from the image generation markers of Provider/ModelKindExtensions.cs. Imagen and the Gemini image models state it in their own families as well, where the capabilities stand next to it.");
+
+    /// <inheritdoc />
+    protected override void Declare(ModelFamilyBuilder builder)
+    {
+        builder.Modifier("flux").AsSubstring().Kind(ModelKind.IMAGE_GENERATION);
+
+        builder.Modifier("stable-diffusion").AsSubstring().Inherits();
+
+        builder.Modifier("sdxl").AsSubstring().Inherits();
+
+        builder.Modifier("dall-e").AsSubstring().Inherits();
+
+        builder.Modifier("midjourney").AsSubstring().Inherits();
+
+        builder.Modifier("image").AsSegment().Inherits();
+    }
+}