PDF.js feature flipper

[jillpe]

Summary

Atla Hyku would like to Implement pdf.js viewer: https://mozilla.github.io/pdf.js/ and have the feature PALs recently implemented in which there is a feature flipper to switch from UV to PDF.js viewer and a check box on the work form, in which left unchecked, does not use either viewer and only have the download.

Helpful tickets:

• https://github.com/scientist-softserv/palni-palci/issues/125

Acceptance Criteria

• [ ] https://mozilla.github.io/pdf.js/ is an embedded PDF viewer
• [ ] As a user, I can use the viewer feature flipper to switch from UV to PDF.js and vice versa
• [ ] Work form check box is available on the work form
  • [ ] If checked, the viewer selected via the feature flipper displays for a work
  • [ ] If uncheck, the viewer does not show, and instead only the download is available on a work

[ckarpinski]

Please see ticket https://github.com/scientist-softserv/atla-hyku/issues/162, this is when i was asked to create a ticket for this and I tried to identify all of the parts of this that I understand to be part of this work.

[jillpe]

covered in #162