Update avatar component

src/utils/avatarUtils.ts

@@ -0,0 +1,11 @@
+import { nameToColor } from "@linagora/twake-mui";
+
+/**
+ * Generate a gradient color from a string
+ * @param str - String to generate color from
+ * @returns Color name for gradient
+ */
+export function stringToGradient(str: string): string | undefined {
+  if (!str) return undefined;
+  return nameToColor(str);
+}