Add one model host per provider and the unwrapping walk

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

@@ -0,0 +1,30 @@
+using AIStudio.Models.Matching;
+using AIStudio.Provider;
+
+namespace AIStudio.Models.Hosting.Hosts;
+
+/// <summary>
+/// A LiteLLM proxy, which somebody operates themselves and names as they please.
+/// </summary>
+/// <remarks>
+/// Aliases here are whatever the operator wrote in their configuration. Many of them keep the
+/// "vendor/model" shape, some name the cloud instead of the vendor ("azure/gpt-5.6"), and some are
+/// a word ("the-fast-one"). Taking off a prefix costs nothing in the last case and helps in the
+/// first two, and a prefix nobody recognizes states no vendor -- so a name the operator invented
+/// is left for the rules to make what they can of.
+///
+/// This is also the host where a person is most likely to correct us by hand, which is what the
+/// expert settings are for: an alias only its operator can decipher is not something rules will
+/// ever get right.
+/// </remarks>
+public sealed class HostLiteLLM : ModelHost
+{
+    /// <inheritdoc />
+    public override LLMProviders Provider => LLMProviders.LITE_LLM;
+
+    /// <inheritdoc />
+    public override ModelSource Source => new("https://docs.litellm.ai/docs/proxy/user_keys", new DateOnly(2026, 9, 11), "Models are whatever the operator named them, 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);
+}