feat: site dashboard scaffolding!

[shrouxm]

Description

Scaffolds the site dashboard so it is ready for future data inputs work. Creates the site tabs, and ability to add/edit a site's depth intervals so that all data inputs can be navigated to. Still needs a bunch more work, but wanted to make the code available now since it's interrelated with the relevant client-shared/backend PRs and paul asked me to! depends on techmatters/terraso-client-shared#105 and techmatters/terraso-backend#843

Checklist

• Corresponding issue has been opened

Fixes #395
Fixes #432
Fixes #396
Fixes #456

Limitations:

• project inputs screen raises warnings (but is functional if not beautiful)
• new formswitch component raises warnings (but is functional)
• project required data inputs are not wired to individual sites yet
• "apply to all intervals" checkbox on individual site depth interval editor does nothing
• no implementation of site or project depth interval presets
• delete site button needs modal confirmation
• redux structure of soilIdSlice doesn't handle newly-created sites
• no delete depth interval button or modal warnings when changing depth intervals

[shrouxm]

@david-code ok this kept growing & growing i am cutting off adding things here. there will need to be a follow-up PR for UI polish once the design is finalized, and a few buttons/interactions don't work yet, but this adds tabs to the site dashboard, UI to add/edit depth intervals, and UI to edit project soil settings!