Run ui-library unit tests on CI

[jardakotesovec]

Describe the issue
There is increasing number of unit tests in ui-library and it would be great to include them in CI run as well

To to run them it requires to run following in ui-library folder

npm install
npm run test

[jardakotesovec]

@withanage Hi Dulip, do you think you could help to add it to github actions?

[withanage]

@jardakotesovec sure, I will implement that.

[jardakotesovec]

@withanage
Hi Dulip,
can just quickly review this one - pkp/ui-library#351

But it seems to be working, so could we move it from withanage/pkp-ui-library-action@main to pkp account before merging?

Thank you

[withanage]

@jardakotesovec ,

Hi Jarda, I moved the pkp-ui-library-action to pkp namespace and left you a comment there ?

[jardakotesovec]

@withanage Its merged, thank you!