Thomas Bouffard

This will allow anybody to test the tools without having to build the project See also #6

Do not used latest for ubuntu, windows and macos but named version to not depends on latest version change.

See announcement https://github.blog/changelog/2021-04-05-github-actions-setup-java-now-support-adopt-openjdk/

It will be easier to run them instead of `java -jar` + class name directives. They could be packaged with the `all in one` jar to simplify the distribution.

We already integrate `allow to run without showing the GUI` in 4f7f0cd5db0a7dba3b502fe68563bcdb7960c789. See https://github.com/alex-hall-idener/svg2xml - [ ] contact @alex-hall-idener (the repository owner) for more information - [ ] propose him...

At least, add tests to prove this works if already implemented

see https://jgraph.github.io/mxgraph/docs/js-api/files/shape/mxStencil-js.html