refactor/status values

[jotalis]

Summary

• Replaced PortalStatus in ApplicantPortal.tsx with entire site's Status reference
• Removed unused RELEASED
• Converted to switch statements in Message.tsx and VerdictComponent for exhaustiveness checking
• Added pre-release statuses (pending and reviewed) to ApplicantSummary donut chart
• Refactored Status enums to be PascalCase

Test Plan

• Disable the ApplicationsClosed check in ApplicationFlow.tsx
• Create a user in local db, e.g.,
  { _id: 'edu.uci.test', status: 'VOID', roles: [ 'Applicant' ], first_name: 'john', last_name: 'doe' }
• Impersonate user on dev -> /api/dev/impersonate/test
• Ensure correct components are displayed

Closes #520

[github-actions]

Deploy preview for irvinehacks-site-2025 ready!

Name	IrvineHacks Site
Preview	Visit Preview
Commit	9e31012