Add CI for jar file

[IDerr]

Hello,
Would be great to add a CI pipeline to build a JAR file also
I have seen the PR #32 whichi include build, but not the JAR gen

Thansk for your work !

[lukin]

@IDerr Hey 👋

Thank you for your suggestion. I have added a script to create a JAR archive, which will be included in CI.

[IDerr]

Thanks for your work!