FormBuilder: Support CAPTCHA

A major use case for afforms is to create public-facing forms. However, without CAPTCHA this isn't currently practical.

This is a Paid Issue Queue item.

assigned to @colemanw

added comp:FormBuilder triaged type:paid-issue-queue labels

mentioned in issue #3761

As of 1.1 (not yet released) formprotection extension supports ReCAPTCHA v2checkbox + v3: https://lab.civicrm.org/extensions/formprotection - currently only supported for quickforms but we could look at an interface to support formbuilder/angular forms.

assigned to @kurund and unassigned @colemanw

This adds v2 support via the Recaptcha2 core extension. https://github.com/civicrm/civicrm-core/pull/24860

@mattwire adding support for v3 to your extension could follow this same pattern.

added has-pull-request label

closed with commit 45293ec8

mentioned in issue extensions/formprotection#6