Moving NmvnLauncher into its own project

[Jaroslav Tulach (JaroslavTulach)]

• Separating launcher into own Maven project.
• Adding ability to execute it in JVM mode - done in 8181526, now it is possible:

elide/native-maven$ mvn install -DskipTests -DdistributionTargetDir="$PWD/apache-maven/target/apache-maven-4.1.0-SNAPSHOT"
elide/native-maven$ mvn -f native/launcher/ exec:exec \
    -Dexec.appArgs="-f `pwd`/examples/java-maven-sample-project/ package"

• Ability to debug in JVM mode - also done in 8181526, use exec.vmArgs and then connect IDE to it:

elide/native-maven$ mvn -f native/launcher/ exec:exec -Dexec.appArgs="--help" \
   -Dexec.vmArgs=-agentlib:jdwp=transport=dt_socket,address=8000,server=y

• Debugging from NetBeans

• Test the project execution in CI
• Use native-maven-plugin to compile the native/launcher project into native executable
  • deferred as it would clash with [WIP]: feat: removing crema #27

[Jaroslav Tulach (JaroslavTulach)]

• first CI actions run failed
• here is another run - this one is green

[Jaroslav Tulach (JaroslavTulach)]

• first exec:exec test in the CI failed
• 2f572ac fixes it - exec:exec successfully finishes