Use parallel Maven build to speed up build time

if we can use parallel Maven build, it could save a lot of time during build phase locally and on CIs.
Example on my locla machine with 8 cores with all dependencies downloaded:

• 11' for mvn clean install -D quickly
• 6'30 for mvn clean install -D quickly -T 1C

Different possibilities:

• use it by default, configured in the pom (requires to be sure it is working great in all environments)
• include parameter only for GitHub actions and provide documentation for end-user to allow faster nuild and let them experiment for a while
• provide documentation for end-user to allow faster nuild and let them experiment for a while