[MVP] Inköp: create order template

[thutter]

As Inköp, I want some kind of templating when creating orders, with products and their amount, to help me create orders faster.

• [ ] basis only in frontend, so no endpoints
• [ ] base template, consuming order data to display
• [ ] template engine to create HTML for E-Mail communication?
• [ ] Create mailto link?

[manaaan]

Relates to exploration in #16 , if we can fully integrate messaging with suppliers within the application.