Add example forms to demo application

[Diaan]

Add example forms to demo application Inspired by Supporting CFA's in Learned Sprint 23 retrospective https://secure.teamretro.com/meetings/6ut8HLg9HGjH2p2nOsw6rP?actionId=5sedeN1mzVbOeGZyH8N0En

### Tasks
- [ ] aks dev for the most complex (complex is not the same as crappy) form as an example (create thread in slack channel)
- [ ] have real-life examples of forms in angular demo
- [ ] have real-life examples of forms in storybook angular