frontend: let users add their license easily when they create a new project

[haraldschilly]

Description

This adds a bit of "antd" to the new project dialog and a dropdown to add or select a license. I also saw traces of giving projects a default name, which didn't work. It's fixed and I'm also adding a timestamp to the default name.

how it looks now:

and after expanding the add license part:

Checklist:

• [ ] Testing instructions are provided, if not obvious
• [ ] Release instructions are provided, if not obvious

[williamstein]

Note: we should add a "Buy a license" link somewhere in the vicinity...