Spendesk: Email template

Working on some new email templates today with @Louis-Victor Morgaut.

We have 2 objectives with this redesign:
- Make the information easier to read and understand
- Bring more branding and friendliness to our users

We worked on typography to better structure the content and played with hand-writing and illustrations in the footer to show the human side of @spendesk.

Illustrations by @valentingalmand 👨‍🎨