Setup jbang and install java if needed:
curl -Ls https://sh.jbang.dev | bash -s - app setup jbang
Create a java file that has dependency on picocli and just runs:
jbang init -t cli hello.java
Run it: ./hello.java
Edit it in vscodium with live fetching of dependencies(you can use your own ide too): jbang edit --open --live hello.java