Refactor queue invite codes

[SMore-Napi]

Move queue pin and qr codes to the new table since they are null most of the time in the queue table.
Table invite_codes(queue_id, token, code_type, created_at, expires_at)

• token stores QR code or PIN code value
• code_type represents the enum: PIN, QR
• when joining the queue by invitation code check whether its expires_at date time is not expired