Add User Manual

[crugas]

Issue:
Add a user manual to GitHub wiki page, with pictures and gifs if appropriate.

Resolution:
Add feature as listed above

Issue tracker:

• Looked through the User Manual and found no solutions
• Found no closed or open issues on the Issues page
• Have downloaded and running the latest version of the program

[crugas]

Completed here: https://github.com/uga-libraries/dlg-uga_aspace_workflow/wiki/User-Manual