Add logo and gif to readme

[bengalengel]

No description provided.

[jdblischak]

The Windows and macOS jobs failed because LaTeX updated yesterday. Happy April Fool's Day!

Until all the mirrors update, it will continue to spuriously fail. From rstudio/tinytex#293 (comment):

The most complicated thing is the CTAN mirrors---tlmgr chooses a random (fastest) mirror each time, so you could have installed TeX Live 2021 successfully with install_tinytex(), but tlmgr_install() could install packages from another CRAN mirror that still has TeX Live 2020. Anyway, I'll look into these problems, although (a couple of days') time will cure them all.

[jdblischak]

Actually related to this PR, R CMD check is going to throw a warning as long as we have the link to the GIF file that isn't included in the package:

File ./inst/OmicNavigator.gif not found in resource path

https://github.com/abbvie-external/OmicNavigator/pull/1/checks?check_run_id=2254569956#step:12:56