ci: add Maven standard workflows

.github/workflows/maven-release.yml

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+name: Release to Maven Central Repository
+on:
+    push:
+        tags:
+            - '*'
+jobs:
+    publish:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+            - name: Set up Java
+              uses: actions/setup-java@v3
+              with:
+                  java-version: '11'
+                  distribution: 'adopt'
+            - name: Cache Maven packages
+              uses: actions/cache@v3
+              with:
+                  path: ~/.m2
+                  key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+                  restore-keys: ${{ runner.os }}-m2
+
+            - name: Build, test, verify
+              run: mvn -B verify
+            - name: Check POM metadata for release
+              run: mvn pomchecker:check-maven-central
+
+            # Running setup-java again overwrites the settings.xml - IT'S MANDATORY TO DO THIS SECOND SETUP!!!
+            - name: Set up Maven Central Repository
+              uses: actions/setup-java@v3
+              with:
+                  java-version: '11'
+                  distribution: 'adopt'
+                  server-id: ossrh
+                  server-username: MAVEN_USERNAME
+                  server-password: MAVEN_PASSWORD
+                  gpg-private-key: ${{ secrets.DATAVERSEBOT_GPG_KEY }}
+                  gpg-passphrase: MAVEN_GPG_PASSPHRASE
+            - name: Sign + Publish release
+              run: mvn -Prelease deploy -DskipAnalysis -DskipUT -DskipIT
+              env:
+                  MAVEN_USERNAME: ${{ secrets.DATAVERSEBOT_SONATYPE_USERNAME }}
+                  MAVEN_PASSWORD: ${{ secrets.DATAVERSEBOT_SONATYPE_TOKEN }}
+                  MAVEN_GPG_PASSPHRASE: ${{ secrets.DATAVERSEBOT_GPG_PASSWORD }}

.github/workflows/maven-snapshot.yml

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+name: Snapshot to Maven Central Repository
+on:
+    push:
+        branches:
+          - main
+          - modernize
+jobs:
+    publish:
+        runs-on: ubuntu-latest
+        if: ${{ !contains(github.event.head_commit.message, '[maven-release-plugin]') }}
+        strategy:
+            matrix:
+                java: [11]
+        steps:
+            - uses: actions/checkout@v4
+            - name: Set up Maven Central Repository
+              uses: actions/setup-java@v3
+              with:
+                  java-version: ${{ matrix.java }}
+                  distribution: 'adopt'
+                  server-id: ossrh
+                  server-username: MAVEN_USERNAME
+                  server-password: MAVEN_PASSWORD
+            - name: Cache Maven packages
+              uses: actions/cache@v3
+              with:
+                  path: ~/.m2
+                  key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+                  restore-keys: ${{ runner.os }}-m2
+            - name: Build, test, verify and publish snapshot
+              run: mvn -B verify -Djdk.version=${{ matrix.java }}
+            - name: Publish snapshot
+              if: ${{ matrix.java == '11' }}
+              run: mvn deploy -DskipUT -DskipIT -Djdk.version=${{ matrix.java }}
+              env:
+                  MAVEN_USERNAME: ${{ secrets.DATAVERSEBOT_SONATYPE_USERNAME }}
+                  MAVEN_PASSWORD: ${{ secrets.DATAVERSEBOT_SONATYPE_TOKEN }}

.github/workflows/maven-test.yml

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+name: Build
+on:
+    push:
+        branches:
+            - main
+            - modernize
+    pull_request:
+jobs:
+    build:
+        name: Build
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v4
+              with:
+                  fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
+            - name: Set up JDK 11
+              uses: actions/setup-java@v3
+              with:
+                  java-version: 11
+                  distribution: 'adopt'
+            - name: Cache SonarCloud packages
+              uses: actions/cache@v3
+              with:
+                  path: ~/.sonar/cache
+                  key: ${{ runner.os }}-sonar
+                  restore-keys: ${{ runner.os }}-sonar
+            - name: Cache Maven packages
+              uses: actions/cache@v3
+              with:
+                  path: ~/.m2
+                  key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+                  restore-keys: ${{ runner.os }}-m2
+            - name: Build, test, analyze
+              env:
+                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # Needed to get PR information, if any
+                  SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+              run: mvn -B -Pcoverage verify org.sonarsource.scanner.maven:sonar-maven-plugin:sonar