Add one model host per provider and the unwrapping walk

app/MindWork AI Studio/Models/Hosting/Hosts/HostGroq.cs

@@ -0,0 +1,24 @@
+using AIStudio.Models.Matching;
+using AIStudio.Provider;
+
+namespace AIStudio.Models.Hosting.Hosts;
+
+/// <summary>
+/// Groq, which serves open weights and writes some of their names the way the hub does.
+/// </summary>
+/// <remarks>
+/// Both spellings appear side by side in its catalog: "llama-3.3-70b-versatile" carries no
+/// organization, "moonshotai/kimi-k2-instruct" and "openai/gpt-oss-120b" do. Taking one off when
+/// there is one settles both without a rule per spelling.
+/// </remarks>
+public sealed class HostGroq : ModelHost
+{
+    /// <inheritdoc />
+    public override LLMProviders Provider => LLMProviders.GROQ;
+
+    /// <inheritdoc />
+    public override ModelSource Source => new("https://console.groq.com/docs/api-reference", new DateOnly(2026, 9, 11), "Models are named either plainly or as the hub names them, and served through the OpenAI-compatible chat completion API.");
+
+    /// <inheritdoc />
+    public override bool TryUnwrap(in ModelId id, out ModelId inner, out ModelVendor? declaredVendor) => HostNaming.TrySplitOrganization(id, out inner, out declaredVendor);
+}