Builds jar files and distribution from bloop config and compiled artifacts

Builds a native-image

##How to build bloop-packager

You should have following on your $PATH:

• Java JDK 11
• sbt
• native-image (will be fetched by sbt-nativeimage if not present)

then

sbt> nativeImage

For run we also need bloop

sbt> nativeImageRun