docs(help) improve User Menu Example

HELP.md

@@ -493,7 +493,40 @@ module.exports = {
         
         CloudCmd.refresh();
     },
+    'C - Create User Menu File': async ({DOM, CloudCmd}) => {
+        const {CurrentInfo} = DOM;
+        
+        const {dirPath} = CurrentInfo;
+        const path = `${dirPath}.cloudcmd.menu.js`;
+        const {prefix} = CloudCmd;
+        
+        const data = await readDefaultMenu({prefix});
+        await createDefaultMenu({
+            path,
+            data,
+            DOM,
+            CloudCmd,
+        });
+    },
 };
+
+async function createDefaultMenu({path, data, DOM, CloudCmd}) {
+    const {IO} = DOM;
+    
+    await IO.write(path, data);
+    await CloudCmd.refresh();
+    
+    DOM.setCurrentByName('.cloudcmd.menu.js');
+    
+    await CloudCmd.EditFile.show();
+}
+
+async function readDefaultMenu({prefix}) {
+    const res = await fetch(`${prefix}/api/v1/user-menu/default`);
+    const data = await res.text();
+    
+    return data;
+}
 ```
 
 You will have ability to run one of this 3 commands with help of double click, enter, or binded key (`F2`, `D` or `P` in this example). Also you can run commands in terminal, or execute any built-in function of `Cloud Commander` extended it's interface.