Add phone to volunteer card

[parkerdavis1]

Created a phone format function.

Added phone number to volunteer card display.

Minor tweak to center photo in horse & volunteer cards.

[benhsm]

re: the type error, this is the result some bad decisions I made with types early on when I was figuring things out. We need to refactor away from the interface types towards the prisma generated types where possible

[benhsm]

For now though, you could just add a phone field to the UserData interface, and that more involved refactoring of the types can wait

[parkerdavis1]

Issue #32 checklist

• [x] Update the database User model to track phone numbers
• [x] Make a reusable input schema for phone number validation
• [x] Integrate input fields for phone numbers into the signup process
• [x] Update the admin users table to display phone numbers
• [x] Update volunteer info cards in the event management routes to display phone numbers