Use ResourceRefs for RenderSystem, add IReloadableSystem, remove UI package.

Voile/Source/UI/UIElement.cs

@@ -1,55 +0,0 @@
-using System.Numerics;
-using Voile.Rendering;
-using Voile.Utils;
-
-namespace Voile.UI;
-
-public abstract class UIElement
-{
-    public Rect Rect { get; set; } = new Rect();
-    public SizeFlags VerticalSizeFlags { get; set; } = SizeFlags.Fill;
-    public SizeFlags HorizontalSizeFlags { get; set; } = SizeFlags.Fill;
-
-    public Vector2 ExpandRatio { get; set; } = Vector2.One;
-
-    public UIElement()
-    {
-        children = new();
-    }
-
-    public void AddChild(UIElement child)
-    {
-        children.Add(child);
-        child.parent = this;
-    }
-
-    public void Render(RenderSystem renderer)
-    {
-        Vector2 parentPos = parent != null ? parent.Rect.Position : Vector2.Zero;
-        renderer.SetTransform(Rect.Position + parentPos, Vector2.Zero, 0);
-        OnRender(renderer);
-
-        foreach (UIElement child in children)
-        {
-            renderer.SetTransform(child.Rect.Position, Vector2.Zero, 0);
-            child.Render(renderer);
-        }
-    }
-
-    protected abstract void OnRender(RenderSystem renderer);
-
-    protected List<UIElement> children;
-    protected UIElement? parent;
-
-    private Logger _logger = new(nameof(UIElement));
-}
-
-
-[Flags]
-public enum SizeFlags
-{
-    ShrinkBegin,
-    ShrinkCenter,
-    ShrinkEnd,
-    Fill
-}