Allow assistants to run in the background (#828)

app/MindWork AI Studio/Tools/AssistantSessions/AssistantSessionSnapshotField.cs

@@ -0,0 +1,45 @@
+// ReSharper disable MemberCanBePrivate.Global
+namespace AIStudio.Tools.AssistantSessions;
+
+/// <summary>
+/// Stores one typed value in an assistant session snapshot.
+/// </summary>
+/// <typeparam name="T">The captured value type.</typeparam>
+public sealed record AssistantSessionSnapshotField<T> : IAssistantSessionSnapshotField
+{
+    /// <summary>
+    /// Initializes a new typed snapshot field.
+    /// </summary>
+    /// <param name="value">The captured value.</param>
+    public AssistantSessionSnapshotField(T value)
+    {
+        this.Value = value;
+    }
+
+    /// <summary>
+    /// Gets the captured value.
+    /// </summary>
+    public T Value { get; }
+
+    /// <inheritdoc />
+    public Type ValueType => typeof(T);
+
+    /// <inheritdoc />
+    public bool TryRead<TValue>(out TValue? value)
+    {
+        if (this.Value is TValue typedValue)
+        {
+            value = typedValue;
+            return true;
+        }
+
+        if (this.Value is null && default(TValue) is null)
+        {
+            value = default;
+            return true;
+        }
+
+        value = default;
+        return false;
+    }
+}