Publish jib-cli so it can be used from Java code

[lion7]

I'm trying to use jib to publish my frontend image as well, just as I did for my Java backend. Previously I used the Docker CLI for this, but I'd like to create all my images without the use of a daemon or elevated rights. If the jib CLI itself would also be published to Maven central, I can re-use it from my Gradle build script to build a non-java image like so:

plugins {
  id("org.siouan.frontend-jdk21") version "10.0.0"
}

frontend {
  nodeVersion.set("24.2.0")
  assembleScript.set("run build")
  checkScript.set("run lint")
}

task<JavaExec>("jib") {
  group = "jib"
  description = "Builds and pushes the container image to the container registry."
  mainClass.set("com.google.cloud.tools.jib.cli.JibCli")
  dependsOn("assembleFrontend")
  args("build", "--image-metadata-out=build/jib-image.json", "--target", "my-image:latest")
}

For completeness and for people coming here from Google, this is my accompanying jib.yaml:

apiVersion: jib/v1alpha1
kind: BuildFile
from:
  image: caddy
layers:
  entries:
    - name: "static"
      files:
        - src: "Caddyfile"
          dest: "/etc/caddy/Caddyfile"
        - src: "dist/"
          dest: "/srv"

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