Make a payment by invoice outside the platform be listed and succeeded

[alexanmtz]

When an order is created as a 'invoice-item', list on the platform and set to succeeded and paid, then we can process and the developer can claim

Current behavior

When an invoice-item is created as an order on Gitpay based on Stripe Webhooks, the order when is paid, nothing happens and we can finalize the payment workflow

Expected behavior

use the webhook to update the order status when an invoice is paid, and set the payment status to 'succeeded'

Useful links

• Github API: https://docs.github.com/en/rest
• Material-UI: https://material-ui.com/

Tips

• All the UI will use Material UI (https://material-ui.com/)
• Use our translation library Run npm run translate on the /frontend folder to sync translation before sending the PR