Update ISIS release process (#109)

* Update release process for full feature releases

* Changes to updating github docs workflow

* isis demos (#101)

* isis demos

* jquery 3.7.1, del projection demo js, del ext themes

* cleanup unused css and layout

* moved demos, linked in nav

* update links in demos and workshops

* place 4 demos in isis-fundamentals pages, moved workshops

* toc update

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Co-authored-by: Jacob Cain <115182890+jrcain-usgs@users.noreply.github.com>