Support thirdweb sign in with phone number

[travisbloom-cb]

FIRST: Confirm whether we need to upgrade to v5 to use this functionality (in that case this is blocked by #773 )

Thirdweb now supports sign in w/ phone number - https://thirdweb.com/dashboard/connect/playground. We'd like to migrate from showcasing email as an option to showing phone number. A few eng notes to consider:

• Our schema assumes the "primary identifiers" of a user are their email, wallet address, or session id. We'll need to figure out any adjustments we'd like to make to account for phone numbers being a primary identifier (prob need an embedded wallet phone number)
• Verify w/ thirdweb they have similar APIs we can leverage to get the phone number
• Figure out how this impacts our merge logic
• Modify the profile form step to account for the fact we have phone number already and need email for instances where that is the case
• Modify the initial sign up page to include sms opt in legalese

[travisbloom-cb]

Please prepare a brief TDD answering the eng notes above at the start of this task.

[travisbloom-cb]

Verified w/ TW team we dont need to upgrade and we can leverage these docs for fetching the phone number. Docs to reference it but the response should now have an optional email or phone field.

[olavoparno]

After a brief discussion we came to the following flow:

• User logs in either using thirdweb phone number sign in or not, and if there's a match with the same phone number that's been verified (reply to SMS), then we match accounts, otherwise we create anew.
• If user logs in using using thirdweb phone number sign in, we do not ask for phone number input on the update your profile form.

[olavoparno]

• [x] update thirdweb deps (v4 still)
• [x] add phone number as thirdweb sign in options
• [ ] test out and modify sign in scenarios such as new account sign in, merge with existing accounts, etc