Signitifantly reduced build size

Updated project folder names
Show only selected layer in visualization
Added rectangle support

src/Artemis.Plugins.LayerBrushes.Color/ColorBrushSettings.cs

@@ -0,0 +1,46 @@
+using System.Collections.Generic;
+using System.ComponentModel;
+using Artemis.Core.Plugins.LayerBrush;
+using SkiaSharp;
+
+namespace Artemis.Plugins.LayerBrushes.Color
+{
+    public class ColorBrushSettings : LayerBrushSettings
+    {
+        private List<SKColor> _colors;
+        private GradientType _gradientType;
+
+        public ColorBrushSettings()
+        {
+            GradientType = GradientType.Solid;
+            Colors = new List<SKColor>();
+        }
+
+        public GradientType GradientType
+        {
+            get => _gradientType;
+            set => SetAndNotify(ref _gradientType, value);
+        }
+
+        public List<SKColor> Colors
+        {
+            get => _colors;
+            set => SetAndNotify(ref _colors, value);
+        }
+    }
+
+    public enum GradientType
+    {
+        [Description("Solid")]
+        Solid,
+
+        [Description("Linear Gradient")]
+        LinearGradient,
+
+        [Description("Radial Gradient")]
+        RadialGradient,
+
+        [Description("Sweep Gradient")]
+        SweepGradient
+    }
+}