Port the OpenAI families and add the model registry

app/MindWork AI Studio/Models/OpenAI/OSeriesFamily.cs

@@ -0,0 +1,51 @@
+using static AIStudio.Provider.Capability;
+
+namespace AIStudio.Models.OpenAI;
+
+/// <summary>
+/// The o-series: o1, o3, o4 and their minis, the models which reason before they answer.
+/// </summary>
+/// <remarks>
+/// Every one of them always reasons; what differs is how much else they can do, and the minis are
+/// consistently the ones which can do less. That the mini is not simply a smaller version of its
+/// generation is why each of them is stated in full: o1-mini has neither images nor tools and
+/// answers only through the chat completion API, while o3-mini has tools but no images.
+///
+/// The minis need no ordering: their patterns are longer, so they win over the generation they
+/// belong to without anybody saying which rule to try first.
+/// </remarks>
+public sealed class OSeriesFamily : ModelFamily
+{
+    /// <inheritdoc />
+    public override ModelVendor Vendor => ModelVendor.OPEN_AI;
+
+    /// <inheritdoc />
+    public override ModelSource Source => new("https://platform.openai.com/docs/models", new DateOnly(2026, 9, 11), "Ported unchanged from the rules in ProviderExtensions.OpenAI.cs, one rule per generation and one per mini.");
+
+    /// <inheritdoc />
+    protected override void Declare(ModelFamilyBuilder builder)
+    {
+        builder.Rule("o1").AsPrefix()
+            .Capabilities(TEXT_INPUT | MULTIPLE_IMAGE_INPUT | TEXT_OUTPUT | FUNCTION_CALLING)
+            .Apis(RESPONSES_API)
+            .Reasoning(ReasoningSupport.ALWAYS);
+
+        builder.Rule("o1-mini").AsPrefix()
+            .Capabilities(TEXT_INPUT | TEXT_OUTPUT)
+            .Apis(CHAT_COMPLETION_API)
+            .Reasoning(ReasoningSupport.ALWAYS);
+
+        builder.Rule("o3").AsPrefix()
+            .Capabilities(TEXT_INPUT | MULTIPLE_IMAGE_INPUT | TEXT_OUTPUT | FUNCTION_CALLING | WEB_SEARCH)
+            .Apis(RESPONSES_API)
+            .Reasoning(ReasoningSupport.ALWAYS);
+
+        builder.Rule("o3-mini").AsPrefix()
+            .Capabilities(TEXT_INPUT | TEXT_OUTPUT | FUNCTION_CALLING)
+            .Apis(RESPONSES_API)
+            .Reasoning(ReasoningSupport.ALWAYS);
+
+        // The one mini which is not cut down: it is the o3 generation under another number.
+        builder.Rule("o4-mini").AsPrefix().InheritsFrom("o3");
+    }
+}