Added transcription providers (#619)

app/MindWork AI Studio/Settings/TranscriptionProvider.cs

@@ -0,0 +1,32 @@
+using System.Text.Json.Serialization;
+
+using AIStudio.Provider;
+
+using Host = AIStudio.Provider.SelfHosted.Host;
+
+namespace AIStudio.Settings;
+
+public readonly record struct TranscriptionProvider(
+    uint Num,
+    string Id,
+    string Name,
+    LLMProviders UsedLLMProvider,
+    Model Model,
+    bool IsSelfHosted = false,
+    string Hostname = "http://localhost:1234",
+    Host Host = Host.NONE) : ISecretId
+{
+    public override string ToString() => this.Name;
+    
+    #region Implementation of ISecretId
+    
+    /// <inheritdoc />
+    [JsonIgnore]
+    public string SecretId => this.Id;
+    
+    /// <inheritdoc />
+    [JsonIgnore]
+    public string SecretName => this.Name;
+    
+    #endregion
+}