Implement first set of simple UI tests and run in CI 🧪

[JamieSlome]

Is your feature request related to a problem? Please describe.

Currently, we do not have any UI tests that run in our CI pipeline. This results in issues like #570, where we are unsure whether a pull request breaks the user interface.

Describe the solution you'd like

1. Choose a frontend/UI testing library - Jest appears to be the most common for testing React
2. Write some simple tests to get the ball rolling; i.e. each page of the UI site renders as expected (snapshot testing is quite good for this)
3. Run these tests in the existing CI pipeline (editable in .github/workflows)

[JamieSlome]

@tt-gideonaryeetey and @divinetettey - as mentioned, does this issue interest you?

[divinetettey]

Yes, we can take a look, my colleague from turntabl; @bill-n would be picking up this issue

[JamieSlome]

@divinetettey - sure, and more than welcome @bill-n 👍

@bill-n - are you able to drop a comment on this issue so I can assign the ticket to you?

[bill-n]

@JamieSlome I am happy to take this task. Is it okay to use Cypress?

[JamieSlome]

@bill-n - absolutely; let's go with Cypress 👍