docs(user-menu) simpolify copy url to current file

User-Menu-Cookbook.md

@@ -21,35 +21,15 @@ module.exports = {
 ## Copy URL to current file
 
 ```js
-const {
-    clipboard = {writeText}
-} = navigator;
-
 export default {
     'F6 - Copy URL to Current File': async ({DOM}) => {
         const {path} = DOM.CurrentInfo;
         const url = `${window.location.href}${path}`;
-    
-       await clipboard.writeText(url);
+        const {default: clipboard}  = await import('https://cdn.skypack.dev/@cloudcmd/clipboard');
+        
+        await clipboard.writeText(url); 
     }
 }
-
-async function writeText(value) {
-    const el = document.createElement('textarea');
-
-    el.value = value;
-
-    document.body.appendChild(el);
-    el.select();
-
-    const is = document.execCommand('copy');
-    document.body.removeChild(el);
-
-    if (is)
-        return;
-
-    return Promise.reject();
-}
 ```
 
 ## Convert flac to mp3