Add footer metadata detailed guides, supporting pages and collections

For consistency I have added footer metadata to the above pages
• include partial to pages
• add footer_meta: true local to header
• nest styles for detailed guides to correct layout issues
• bumped toolkit gem version to include measurement variables used

https://www.agileplannerapp.com/boards/105200/cards/6292
do these widths only want applying on desktop layouts? looking at `app/assets/stylesheets/frontend/helpers/_document_footer_meta.scss` the widths these are overriding are in a `media(tablet)` block.