Convert formatBytes to TypeScript

frontend/src/Utilities/Number/formatBytes.ts

@@ -1,6 +1,6 @@
 import { filesize } from 'filesize';
 
-function formatBytes(input) {
+function formatBytes(input: string | number) {
   const size = Number(input);
 
   if (isNaN(size)) {
@@ -9,7 +9,7 @@ function formatBytes(input) {
 
   return `${filesize(size, {
     base: 2,
-    round: 1
+    round: 1,
   })}`;
 }