Add basic ui controller

Assets/Shaders/HSL.cginc

@@ -0,0 +1,11 @@
+#ifndef HSL_INCLUDED
+#define HSL_INCLUDED
+
+inline float3 HSL2RGB(float3 hsl) {
+    int3 n = int3(0, 8, 4);
+    float3 k = (n + hsl.x * 12) % 12;
+    float a = hsl.y * min(hsl.z, 1 - hsl.z);
+    return hsl.z - a * max(-1, min(k - 3, min(9 - k, 1)));
+}
+
+#endif