Switch from Gradle to Maven (#73)

.github/CODEOWNERS

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+* @jenkinsci/groovy-events-listener-plugin-developers

.github/dependabot.yml

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+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuring-dependabot-version-updates
+---
+version: 2
+updates:
+  - package-ecosystem: "maven"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/release-drafter.yml

@@ -1,3 +1,4 @@
+# https://github.com/jenkinsci/.github/blob/master/.github/release-drafter.adoc
+---
 _extends: .github
-tag-template: $NEXT_MINOR_VERSION
-version-template: $MAJOR.$MINOR
+tag-template: groovy-events-listener-plugin-$NEXT_MINOR_VERSION

.github/workflows/jenkins-security-scan.yml

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+# More information about the Jenkins security scan can be found at the developer docs: https://www.jenkins.io/redirect/jenkins-security-scan/
+---
+name: Jenkins Security Scan
+on:
+  push:
+    branches:
+      - "master"
+      - "main"
+  pull_request:
+    types: [opened, synchronize, reopened]
+  workflow_dispatch:
+
+permissions:
+  security-events: write
+  contents: read
+  actions: read
+
+jobs:
+  security-scan:
+    uses: jenkins-infra/jenkins-security-scan/.github/workflows/jenkins-security-scan.yaml@v2
+    with:
+      java-cache: 'maven'  # Optionally enable use of a build dependency cache. Specify 'maven' or 'gradle' as appropriate.
+      java-version: 11  # What version of Java to set up for the build.

.github/workflows/release-drafter.yml

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+# Automates creation of Release Drafts using Release Drafter
+# More Info: https://github.com/jenkinsci/.github/blob/master/.github/release-drafter.adoc
+---
+on:
+  push:
+    branches:
+      - master
+      - main
+
+jobs:
+  update_release_draft:
+    runs-on: ubuntu-latest
+    steps:
+      # Drafts your next Release notes as Pull Requests are merged into the default branch
+      - uses: release-drafter/release-drafter@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.mvn/extensions.xml

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+<extensions xmlns="http://maven.apache.org/EXTENSIONS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/EXTENSIONS/1.0.0 http://maven.apache.org/xsd/core-extensions-1.0.0.xsd">
+  <extension>
+    <groupId>io.jenkins.tools.incrementals</groupId>
+    <artifactId>git-changelist-maven-extension</artifactId>
+    <version>1.7</version>
+  </extension>
+</extensions>

.mvn/maven.config

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+-Pconsume-incrementals
+-Pmight-produce-incrementals

Jenkinsfile

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-
-buildPluginWithGradle(jdkVersions: ['11'])
+buildPlugin(useContainerAgent: true, configurations: [
+  [platform: 'linux', jdk: 11],
+  [platform: 'windows', jdk: 11],
+])