How should I build jar package and place to `gatling-charts-highcharts-bundle-3.3.1/lib` directory?

Because I need to use self-sign function in Sign.scala file, so I want to build one jar package and place to gatling-charts-highcharts-bundle-3.3.1/lib directory.

I know how use gatling-maven-plugin run script (using mvn gatling:test …)

but I want to use gatling command, thanks!