Move the model kinds into the rule engine

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

@@ -0,0 +1,33 @@
+using AIStudio.Provider;
+
+namespace AIStudio.Models.Kinds;
+
+/// <summary>
+/// The models which hold a spoken conversation over a live connection.
+/// </summary>
+/// <remarks>
+/// They speak a protocol of their own, usually a WebSocket, and answer a chat completion request
+/// with an error. Their names are built out of the models they grew from -- gpt-4o-realtime-preview,
+/// gpt-realtime-mini -- so a name of this kind regularly carries a word about hearing or speaking as
+/// well. Whichever of the two is longer would otherwise decide, and the live connection is the part
+/// that makes the model unusable for a chat.
+/// </remarks>
+public sealed class RealtimeModelsFamily : ModelFamily
+{
+    /// <summary>
+    /// Why this outranks what a name says about hearing or speaking.
+    /// </summary>
+    private const string THE_CONNECTION_DECIDES = "These names are built from the transcription and audio models they grew out of, so those markers match them too. The live connection is what rules out a chat, no matter what else the name says.";
+
+    /// <inheritdoc />
+    public override ModelVendor Vendor => ModelVendor.UNKNOWN;
+
+    /// <inheritdoc />
+    public override ModelSource Source => new("https://platform.openai.com/docs/guides/realtime", new DateOnly(2026, 9, 12), "Ported from the realtime marker of Provider/ModelKindExtensions.cs, where the same precedence was written as the order of two if statements.");
+
+    /// <inheritdoc />
+    protected override void Declare(ModelFamilyBuilder builder) =>
+        builder.Modifier("realtime").AsSubstring()
+            .Rank(1, THE_CONNECTION_DECIDES)
+            .Kind(ModelKind.REALTIME);
+}