/xldata window refactor (#1257)

Reworks the `/xldata` window so that each individual section is in its own file.

Dalamud/Interface/Internal/Windows/Data/Widgets/ImGuiWidget.cs

@@ -0,0 +1,74 @@
+using System;
+
+using Dalamud.Interface.Internal.Notifications;
+using Dalamud.Interface.Windowing;
+using ImGuiNET;
+
+namespace Dalamud.Interface.Internal.Windows.Data;
+
+/// <summary>
+/// Widget for displaying ImGui test.
+/// </summary>
+internal class ImGuiWidget : IDataWindowWidget
+{
+    /// <inheritdoc/>
+    public DataKind DataKind { get; init; } = DataKind.ImGui;
+
+    /// <inheritdoc/>
+    public bool Ready { get; set; }
+
+    /// <inheritdoc/>
+    public void Load()
+    {
+        this.Ready = true;
+    }
+
+    /// <inheritdoc/>
+    public void Draw()
+    {
+        var interfaceManager = Service<InterfaceManager>.Get();
+        var notifications = Service<NotificationManager>.Get();
+
+        ImGui.Text("Monitor count: " + ImGui.GetPlatformIO().Monitors.Size);
+        ImGui.Text("OverrideGameCursor: " + interfaceManager.OverrideGameCursor);
+
+        ImGui.Button("THIS IS A BUTTON###hoverTestButton");
+        interfaceManager.OverrideGameCursor = !ImGui.IsItemHovered();
+
+        ImGui.Separator();
+
+        ImGui.TextUnformatted($"WindowSystem.TimeSinceLastAnyFocus: {WindowSystem.TimeSinceLastAnyFocus.TotalMilliseconds:0}ms");
+
+        ImGui.Separator();
+
+        if (ImGui.Button("Add random notification"))
+        {
+            var rand = new Random();
+
+            var title = rand.Next(0, 5) switch
+            {
+                0 => "This is a toast",
+                1 => "Truly, a toast",
+                2 => "I am testing this toast",
+                3 => "I hope this looks right",
+                4 => "Good stuff",
+                5 => "Nice",
+                _ => null,
+            };
+
+            var type = rand.Next(0, 4) switch
+            {
+                0 => NotificationType.Error,
+                1 => NotificationType.Warning,
+                2 => NotificationType.Info,
+                3 => NotificationType.Success,
+                4 => NotificationType.None,
+                _ => NotificationType.None,
+            };
+
+            const string text = "Bla bla bla bla bla bla bla bla bla bla bla.\nBla bla bla bla bla bla bla bla bla bla bla bla bla bla.";
+
+            notifications.AddNotification(text, title, type);
+        }
+    }
+}