feat: create sandbox from standalone modal

[CompuIves]

Couple of changes:

• Folder & privacy are now coupled to each-other
• We can create sandboxes from the standalone modal
• We can pass in a minimum privacy

[codesandbox[bot]]

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• Application (fast + production)
• Application (fast + stream)

[sentry-io[bot]]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ TypeError: Cannot read properties of null (reading 'status') CreateBoxForm(src/app/components/Create/CreateB... View Issue
• ‼️ AxiosError: Request aborted <object>.post(src/app/overmind/effects/api/apiF... View Issue

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