Add github actions

.github/workflows/ci.yml

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+name: CI/CD
+
+on: push
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+
+    - uses: actions/cache@v1
+      with:
+        path: ~/.gradle/caches
+        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
+        restore-keys: |
+          ${{ runner.os }}-gradle-
+
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v3
+      with:
+        java-version: 8
+        distribution: temurin
+
+    - name: Build with Gradle
+      run: ./gradlew build

.github/workflows/prerelease.yml

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+name: Prerelease
+
+on:
+  push:
+    branches:
+    - main
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+
+    - name: Get next Version
+      id: tag_version
+      uses: mathieudutour/github-tag-action@d745f2e74aaf1ee82e747b181f7a0967978abee0
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        release_branches : .*
+        dry_run: true
+
+    - uses: actions/cache@v1
+      with:
+        path: ~/.gradle/caches
+        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
+        restore-keys: |
+          ${{ runner.os }}-gradle-
+
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v3
+      with:
+        java-version: 8
+        distribution: temurin
+
+    - name: Build jar with Gradle
+      run: ./gradlew -Pversion='${{ steps.tag_version.outputs.new_version }}-SNAPSHOT' jar
+
+    - name: Publish to GitHub Maven with Gradle
+      run: ./gradlew -Pversion='${{ steps.tag_version.outputs.new_version }}-SNAPSHOT' publishInterlisCustomFunctionsPublicationToGitHubPackagesRepository
+      env:
+        ORG_GRADLE_PROJECT_GITHUB_ACTOR: ${{ github.actor }}
+        ORG_GRADLE_PROJECT_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        ORG_GRADLE_PROJECT_SIGNING_KEY: ${{ secrets.SIGNING_KEY }}
+        ORG_GRADLE_PROJECT_SIGNING_PASSWORD: ${{ secrets.SIGNING_PASSWORD }}
+
+    - uses: ncipollo/release-action@a2e71bdd4e7dab70ca26a852f29600c98b33153e
+      with:
+        artifacts: "build/libs/*.jar"
+        allowUpdates: true
+        name: ${{ steps.tag_version.outputs.new_tag }}-SNAPSHOT
+        tag: ${{ steps.tag_version.outputs.new_tag }}-SNAPSHOT-${{ github.run_id }}
+        commit: ${{ github.sha }}
+        body: ${{ steps.tag_version.outputs.changelog }}
+        prerelease: true
+        token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/release.yml

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+name: Release
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+
+    - name: Bump version and push tag
+      id: tag_version
+      uses: mathieudutour/github-tag-action@d745f2e74aaf1ee82e747b181f7a0967978abee0
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        release_branches: .*
+
+    - uses: actions/cache@v1
+      with:
+        path: ~/.gradle/caches
+        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
+        restore-keys: |
+          ${{ runner.os }}-gradle-
+
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v3
+      with:
+        java-version: 8
+        distribution: temurin
+
+    - name: Build jar with Gradle
+      run: ./gradlew -Pversion='${{ steps.tag_version.outputs.new_version }}' jar
+
+    - name: Publish to GitHub Maven with Gradle
+      run: ./gradlew -Pversion='${{ steps.tag_version.outputs.new_version }}' publishInterlisCustomFunctionsPublicationToGitHubPackagesRepository
+      env:
+        ORG_GRADLE_PROJECT_GITHUB_ACTOR: ${{ github.actor }}
+        ORG_GRADLE_PROJECT_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        ORG_GRADLE_PROJECT_SIGNING_KEY: ${{ secrets.SIGNING_KEY }}
+        ORG_GRADLE_PROJECT_SIGNING_PASSWORD: ${{ secrets.SIGNING_PASSWORD }}
+
+    - uses: ncipollo/release-action@a2e71bdd4e7dab70ca26a852f29600c98b33153e
+      with:
+        artifacts: "build/libs/*.jar"
+        makeLatest: true
+        name: ${{ steps.tag_version.outputs.new_tag }}
+        tag: ${{ steps.tag_version.outputs.new_tag }}
+        body: ${{ steps.tag_version.outputs.changelog }}
+        token: ${{ secrets.GITHUB_TOKEN }}