[Jmix rent-your-stuff] #31 - Create rental order - Part 7 - Create CRUD Order UI

Issue #31 - Create rental order - Part 7 - Create CRUD order UI
After having the domain model in place, let's start with a very simple UI for the order
* generate UI for order management
* talk about limitations of CRUD based UIs
* explore possible improvements for the UI to make it more usable