Add a Gradle task for releasing

[MihaiBojin]

• take an increment parameter (patch, minor, major)
• parsegradle.properties / version=x.y.z-SNAPSHOT
• check main, not-dirty, up-to-date with origin/main
• git tag vx.y.z
• git push vx.y.z
• setgradle.properties / version=
  • patch: x.y.z+1
  • minor: x.y+1.0
  • major: x+1.0.0