Add a feedback form to reference pages

[nickmcintyre]

Increasing Access

The website currently directs visitors to GitHub if they'd like to provide feedback. This approach isn't accessible for people without GitHub accounts, especially K–12 students.

Most appropriate sub-area of p5.js?

Reference

Feature request details

@limzykenneth @davepagurek @Qianqianye I think it would be helpful to link to a minimal feedback form at the bottom of reference pages. The form could be owned by a @p5js.org Google account and responses could be shared with documentation contributors. What do y'all think?