Added the visual briefing assistant (#893)

app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingControlSpec.cs

@@ -0,0 +1,32 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace AIStudio.Assistants.VisualBriefing;
+
+/// <summary>
+/// Defines one bounded declarative interaction control.
+/// </summary>
+[JsonUnmappedMemberHandling(JsonUnmappedMemberHandling.Disallow)]
+[CanonicalJsonShape("42306121")]
+public sealed class VisualBriefingControlSpec
+{
+    /// <summary>Gets or sets the globally unique control identifier.</summary>
+    [JsonRequired]
+    public string ControlId { get; init; } = string.Empty;
+
+    /// <summary>Gets or sets the owning component identifier.</summary>
+    [JsonRequired]
+    public string ComponentId { get; init; } = string.Empty;
+
+    /// <summary>Gets or sets the control kind.</summary>
+    [JsonRequired]
+    public VisualBriefingControlKind Kind { get; init; }
+
+    /// <summary>Gets or sets the deterministic initial value.</summary>
+    [JsonRequired]
+    public JsonElement InitialValue { get; init; }
+
+    /// <summary>Gets or sets the selectable options.</summary>
+    [JsonRequired]
+    public List<VisualBriefingControlOption> Options { get; init; } = [];
+}