Create script for shared jekyll/antora css, images, and js

[steven1046]

Create a script to copy over the css/images used by both jekyll and the antora build over to the antora ui directory during build time so there aren't duplicates. This will probably require us to either make a subdirectory for shared css/images or have a list somewhere that specifies what files we want to copy over.

[steven1046]

Also try to handle javascript in this issue if we can eliminate duplicate js used in both jekyll and doc pages.