chore: Move color transformers to new file

invokeai/frontend/web/src/common/util/colorCodeTransformers.ts

@@ -0,0 +1,17 @@
+import type { RgbaColor } from 'react-colorful';
+
+export function rgbaToHex(color: RgbaColor): string {
+  const hex = ((1 << 24) + (color.r << 16) + (color.g << 8) + color.b).toString(16).slice(1);
+  const alphaHex = Math.round(color.a * 255)
+    .toString(16)
+    .padStart(2, '0');
+  return `#${hex}${alphaHex}`;
+}
+
+export function hexToRGBA(hex: string, alpha: number) {
+  hex = hex.replace(/^#/, '');
+  const r = parseInt(hex.substring(0, 2), 16);
+  const g = parseInt(hex.substring(2, 4), 16);
+  const b = parseInt(hex.substring(4, 6), 16);
+  return { r, g, b, a: alpha };
+}