Unit testing for loqui

[cansavvy]

          There is no automated testing for this app. I just manually test by seeing if the video renders. I have been thinking about automated testing for this Shiny app and I can take a look at this article for more info: https://shiny.posit.co/r/articles/improve/testing-overview/

Originally posted by @howardbaek in #17 (comment)

Just logging this as an issue to address later!