Attempting to make a standalone env

Hello! I've just started learning how to develop for Bangle and I'm attempting to set up an environment using vscode, since it's absolutely painful to use a web ide for that. So I'm having some trouble with it, and getting some answers on the following would help immensely:

1. For bridging with the Bangle, I'm using the Espruino CLI (from npm), but I couldn't find any way to get some IDE functionality such as uploading files to storage (there's a "--storage" flag, but I can't find much in terms of what do I have to pass to it to get files to storage).
   
2. Is there a way to send multiple files to the device simultaneously? This is so I could just "deploy" the whole app: info file, js files, img file, at the same time.
   
3. The IDE appears to hold a BLE connection active across multiple commands, but each command via CLI creates and stops a connection, and when that happens it takes some time for it to be able to pair again which makes developing slower.
   
4. Is there a standalone emulator that I can use outside of the web ide?
   
   

Many thanks!