Added starter ACF field groups

Property	Value
description	Added the shipped baseline ACF field-group suite for options, users, media, posts, and terms.

• Added the Admin Options field group and attached it to the Admin Options options page.
• Added the Client Options field group and attached it to the Client Options options page.
• Added the User field group and attached it to all users.
• Added the Media field group and attached it to attachments.
• Added the Post field group and attached it to posts, pages, blog posts, and legal pages.
• Added the Term field group and attached it to categories and tags.
• Shipped the baseline with starter metadata scaffolding already in place across options, users, media, posts, and terms.