docs: added a user guide for prices bulk editor (#4569)

* docs: added bulk editor user guide

* fixed shortcut

www/docs/src/utils/get-os-shortcut.ts

@@ -0,0 +1,8 @@
+export default function getOsShortcut() {
+  const isMacOs =
+    typeof navigator !== "undefined"
+      ? navigator.userAgent.toLowerCase().indexOf("mac") !== 0
+      : true
+
+  return isMacOs ? "⌘" : "Ctrl"
+}