Let users set 12/24 hour time format

[pumfleet]

What does this PR do?

Add a new timeFormat field to the user which lets you set 12/24 hour time format in the dashboard. It updates the booking page, availability page and getting started page to use the new time format. It also adds it as an extra field in settings.

Closes #1990

Type of change

• New feature (non-breaking change which adds functionality)

How should this be tested?

• Run migration
• Update time format in settings
• Check relevant pages in the app to see that the format is correct

Checklist

• I haven't read the contributing guide
• My code doesn't follow the style guidelines of this project
• I haven't checked if my PR needs changes to the documentation
• I haven't added tests that prove my fix is effective or that my feature works
• I haven't checked if new and existing unit tests pass locally with my changes

[vercel]

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docs – ./apps/docs

🔍 Inspect: https://vercel.com/cal/docs/6jgFoVPDV8Kt8PfsjyTREhfsmNr9
✅ Preview: Canceled

calendso – ./apps/web

🔍 Inspect: https://vercel.com/cal/calendso/C3XVeYWCxKmrT4wcooKUBaJMb8ov
✅ Preview: https://calendso-git-dashboard-time-format-cal.vercel.app

[agustif]

Looks good to me, just added a small DRY nitpick not really important. awesome thanks Bailey