Delegate registration improvements

[aaronmgdr]

Problem

the point of the verification is to show that that identity is linked to that address. but people are just linking to random posts.

also they sometimes submit stuff that doesnt render well. we should link to the preview site (if its easy to do)

Solution

• add link to the preview site after form submits
• explains that the verification MUST show the address you are submitting with

[aaronmgdr]

todo make sure preview is public

since preview takes a while to deploy instead link to PR and provide instructions