Port the Mistral families, including the release date logic

app/MindWork AI Studio/Models/Mistral/VoxtralFamily.cs

@@ -0,0 +1,26 @@
+using static AIStudio.Provider.Capability;
+
+namespace AIStudio.Models.Mistral;
+
+/// <summary>
+/// Voxtral, the Mistral models which listen.
+/// </summary>
+/// <remarks>
+/// They take speech as input and answer in text, which makes them neither a chat model nor a
+/// transcription model but something in between: they understand what was said rather than only
+/// writing it down.
+/// </remarks>
+public sealed class VoxtralFamily : ModelFamily
+{
+    /// <inheritdoc />
+    public override ModelVendor Vendor => ModelVendor.MISTRAL_AI;
+
+    /// <inheritdoc />
+    public override ModelSource Source => new("https://docs.mistral.ai/getting-started/models/models_overview/", new DateOnly(2026, 9, 11), "Ported unchanged from the rules in ProviderExtensions.OpenSource.cs: speech in, text out, tool calling.");
+
+    /// <inheritdoc />
+    protected override void Declare(ModelFamilyBuilder builder) =>
+        builder.Rule("voxtral").AsSegment()
+            .Capabilities(TEXT_INPUT | SPEECH_INPUT | TEXT_OUTPUT | FUNCTION_CALLING)
+            .Apis(CHAT_COMPLETION_API);
+}