Add default configuration for assistants (#52)

app/MindWork AI Studio/Settings/DataModel/SendBehavior.cs

@@ -0,0 +1,28 @@
+namespace AIStudio.Settings.DataModel;
+
+/// <summary>
+/// Possible behaviors for sending the input to the AI.
+/// </summary>
+public enum SendBehavior
+{
+    /// <summary>
+    /// There is no shortcut to send the input to the AI. The user must click
+    /// the send button. The enter key adds a new line.
+    /// </summary>
+    NO_KEY_IS_SENDING,
+    
+    /// <summary>
+    /// The user can send the input to the AI by pressing any modifier key
+    /// together with the enter key. Alternatively, the user can click the sent
+    /// button. The enter key alone adds a new line.
+    /// </summary>
+    MODIFER_ENTER_IS_SENDING,
+    
+    /// <summary>
+    /// The user can send the input to the AI by pressing the enter key. In order
+    /// to add a new line, the user must press the shift key together with the
+    /// enter key. Alternatively, the user can click the send button to send the
+    /// input to the AI.
+    /// </summary>
+    ENTER_IS_SENDING,
+}