Added the Google provider (#201)

app/MindWork AI Studio/Provider/Model.cs

@@ -4,11 +4,33 @@ namespace AIStudio.Provider;
 /// The data model for the model to use.
 /// </summary>
 /// <param name="Id">The model's ID.</param>
-public readonly record struct Model(string Id)
+/// <param name="DisplayName">The model's display name.</param>
+public readonly record struct Model(string Id, string? DisplayName)
 {
     #region Overrides of ValueType
 
-    public override string ToString() => string.IsNullOrWhiteSpace(this.Id) ? "no model selected" : this.Id;
+    public override string ToString()
+    {
+        if(!string.IsNullOrWhiteSpace(this.DisplayName))
+            return this.DisplayName;
+        
+        if(!string.IsNullOrWhiteSpace(this.Id))
+            return this.Id;
+        
+        return "no model selected";
+    }
+
+    #endregion
+
+    #region Implementation of IEquatable<Model?>
+
+    public bool Equals(Model? other)
+    {
+        if(other is null)
+            return false;
+        
+        return this.Id == other.Value.Id;
+    }
 
     #endregion
 }