[Epic] Import web app from legacy repo

[tschaffter]

https://github.com/Sage-Bionetworks/rocc-app

• [x] #68
• [x] #70
• [x] #71
• [x] #72
• [x] #73
• [x] #74
• [x] #100
• [x] #106
• [x] #75
• [x] #76
• [x] #77

[tschaffter]

The project web-app is an MVP that shows that the web app can fetch data from the API.

Mirroring the content of https://github.com/Sage-Bionetworks/rocc-app into this repo depends on whether the team decide to adopt this monorepo.