ISIS Application Docs style overhaul (#5617)

* home, header, toc (minus images/icons)

* application docs overview, parameters

* formatting on specific isis docs

* style changes - examples, print

* usgs footer

* print friendly css

* isis-docs-sitewide css

* header lock, add footer to main

* icon assets (pd)

* removed PrinterFriendly doc builds and old footers

* mobile menu

* header remove search, tabs scroll

* menuPath for header assets, s3 common for fonts

* remove ancient menu assets