Installable module odoo v14 button POS

I need a simple button added on the top of the ticket screen in Odoo v14 POS. I need the base manifest file, the JS and the XML file. The button needs to do nothing at all, we will add the function of the button ourselves. We just need the basic code that will show a button on the POS . This is absolute micro project, base code can be found on website of cybrosys.

Fixed price 8.5 EUR. No bidding, price is fixed.