chore: add raii, tables code from OtterGui into new Dalamud.Interface assembly

Dalamud.Interface/Raii/Color.cs

@@ -0,0 +1,66 @@
+using System.Numerics;
+using ImGuiNET;
+
+namespace Dalamud.Interface.Raii;
+
+// Push an arbitrary amount of colors into an object that are all popped when it is disposed.
+// If condition is false, no color is pushed.
+public static partial class ImRaii
+{
+    public static Color PushColor(ImGuiCol idx, uint color, bool condition = true)
+        => new Color().Push(idx, color, condition);
+
+    public static Color PushColor(ImGuiCol idx, Vector4 color, bool condition = true)
+        => new Color().Push(idx, color, condition);
+
+    // Push colors that revert all current color changes made temporarily.
+    public static Color DefaultColors()
+    {
+        var ret          = new Color();
+        var reverseStack = Color.Stack.GroupBy(p => p.Item1).Select(p => (p.Key, p.First().Item2)).ToArray();
+        foreach (var (idx, val) in reverseStack)
+            ret.Push(idx, val);
+        return ret;
+    }
+
+    public sealed class Color : IDisposable
+    {
+        internal static readonly List<(ImGuiCol, uint)> Stack = new();
+        private                  int                    _count;
+
+        public Color Push(ImGuiCol idx, uint color, bool condition = true)
+        {
+            if (condition)
+            {
+                Stack.Add((idx, ImGui.GetColorU32(idx)));
+                ImGui.PushStyleColor(idx, color);
+                ++this._count;
+            }
+
+            return this;
+        }
+
+        public Color Push(ImGuiCol idx, Vector4 color, bool condition = true)
+        {
+            if (condition)
+            {
+                Stack.Add((idx, ImGui.GetColorU32(idx)));
+                ImGui.PushStyleColor(idx, color);
+                ++this._count;
+            }
+
+            return this;
+        }
+
+        public void Pop(int num = 1)
+        {
+            num    =  Math.Min(num, this._count);
+            this._count -= num;
+            ImGui.PopStyleColor(num);
+            Stack.RemoveRange(Stack.Count - num, num);
+        }
+
+        public void Dispose()
+            => this.Pop(this._count);
+    }
+}