document the workflows and upgrade node version

[xmonader]

also noticed the

• CI depends on node 14, is there a specific reason or is it just outdated?
• there're no tests? the CI workflow just builds the repo?
• there're lint, typegen and codegen tasks in the package.json that should get integrated in the CI too

[DylanVerstraete]

Should use node 16

There are no tests in this project.

[xmonader]

thanks for the quick upgrade

I added more tasks for the lint, generation tasks to be integrated in the workflows