Print options update

[frogpad7]

Currently as exploration is being performed in other projects, this is a combined list of absolutes & options for users of Pelican to modify the visibility of elements in a printout of any page (with Pelican elements):

Absolutes

• Skip to Main
• Sidebar
• Topbar
• Nav elements (Breadcrumbs)
• Footer elements
• Popover
• Table of Contents
• Fixed Position items

Optional

• Specific buttons
• Pagination

Other brainstorming ideas to experiment with:

• Having multiple print style files for toggling variations (similar to component file naming)
• Placing all elements onto one index layer, and making that layer invisible when printing
• Creating a global class style that is manually placed on elements to hide them

Questions:
What should be done with visible modals? Don't consider them differently. Treat them the same as other elements intended to be drawn.
What is a better approach: multiple files that are manually inserted for styles or a variable file controlling which print features are toggled?

[frogpad7]

Going to take comments and separate into new files to have different demo able print layouts to showcase.