add capitalizeFirstLetter utility

src/lib/index.ts

@@ -31,7 +31,8 @@ export {
 	type IconDef,
 	getLabel,
 	getValue,
-	defaultIconProps
+	defaultIconProps,
+	capitalizeFirstLetter
 } from './util';
 export {
 	type ToolbarToggleState,

src/lib/util.ts

@@ -87,3 +87,9 @@ export function targetMust<T extends HTMLElement>(event: Event): T {
 	}
 	return target;
 }
+
+/** capitalizeFirstLetter capitalizes the first letter of a string */
+export const capitalizeFirstLetter = (str: string): string => {
+	const lower = str.toLowerCase();
+	return lower.charAt(0).toUpperCase() + lower.slice(1);
+};