feat(shared): add cn utility for tailwind-aware class merging

src/shared/lib/utils/index.ts

@@ -15,6 +15,7 @@ export {
     type QueryParamValue,
 } from './buildQueryString/buildQueryString';
 export { clampNumber } from './clampNumber/clampNumber';
+export { cn } from './cn';
 export { debounce } from './debounce/debounce';
 export { getDecimalPlaces } from './getDecimalPlaces/getDecimalPlaces';
 export { getSkeletonWidth } from './getSkeletonWidth/getSkeletonWidth';