Upgrade survey add-on to ProudCity Forms

[lukefretwell]

Source The source of the issue (ex: Customer: #CustomerName#).

• https://proudcity.zendesk.com/agent/tickets/6663
• https://proudcity.zendesk.com/agent/tickets/6676

Is your feature request related to a problem? Please describe. A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Customer request

What feature would you like to improve A clear and concise description of the current feature.

ProudCity Forms

Describe the solution you'd like A clear and concise description of what you want to happen.

Add survey feature

Additional context Add any other context or screenshots about the feature request here.

https://www.gravityforms.com/add-ons/survey/