Add "Terms & Condition" in a profile

[masetto]

The original question of @robbrandt was:

Is it possible to add a GDPR Terms & Conditions checkbox to any profile?

@tapashdatta, the checkbox "Use as the mailing subscribe page" add Communication preferences but does not add Terms & Conditions checkbox which is used instead in contribution and event pages.

How can I add "Terms & Condition" in a profile? (for example "Become a volunteer", signup form...)

Originally posted by @masetto in #126 (comment)