new.profile.blade file update for dbo.knumber value

[Gryph667]

Describe the bug
When navigating to the https://squire.aprilknights.org/profile/new page, the Knight Number field should auto populate with the next available number.

Right now, the user gets an error for leaving it blank or entering one already in use.

This can be accomplished either with a query to dbo.knight.knum, or by setting an arbitrary value in a set location that just increases by one every time the profile/new page is loaded.