setup CI workflows

.github/workflows/ci.yml

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+name: "CI"
+
+on:
+  push:
+    branches: [ "main" ]
+    paths-ignore: ["docs/**", "**/README.md", "**/CODE_OF_CONDUCT.md", "**/CONTRIBUTING.md", "**/LICENSE"]
+  pull_request:
+    branches: ["main"]
+    paths-ignore: ["docs/**", "**/README.md", "**/CODE_OF_CONDUCT.md", "**/CONTRIBUTING.md", "**/LICENSE"]
+    types:
+      - opened
+      - reopened
+      - synchronize
+  workflow_dispatch:
+    inputs:
+      spark-version:
+        description: 'Spark version for the build (SemVer)'
+        required: true
+
+jobs:
+  spark_versions_validation:
+    if: ${{ github.event_name != 'workflow_dispatch' }}
+    strategy:
+      matrix:
+        spark_version: ['3.2.4', '3.3.2', '3.4.1']
+    runs-on: ubuntu-latest
+    steps: 
+    - uses: actions/checkout@v4
+    - uses: actions/setup-java@v3
+      with:
+        java-version: 8
+        distribution: "temurin"
+        cache: "sbt"
+    - env:
+        SPARK_VERSION_OVERRIDE: ${{ matrix.spark_version }}
+      run: |
+        echo "$SPARK_VERSION_OVERRIDE" > project/spark-version.conf
+    - run: cat project/spark-version.conf
+    - run: sbt compile 
+    - run: sbt test 
+
+  build:
+    runs-on: ubuntu-latest
+    env:
+      SPARK_VERSION_OVERRIDE: ${{ inputs.spark-version }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v3
+        with:
+          java-version: 8
+          distribution: "temurin"
+          cache: "sbt"
+      - if: ${{ env.SPARK_VERSION_OVERRIDE != '' }}
+        run: echo "$SPARK_VERSION_OVERRIDE" > project/spark-version.conf
+      - run: sbt compile 
+      - run: sbt test 
+      - run: sbt package
+      - run: tar cf artefacts.tar target/scala-*/*.jar */target/scala-*/*.jar
+      - uses: actions/[email protected]
+        with:
+          name: Artefacts
+          path: artefacts.tar
+
+run-name: ${{ github.event_name == 'workflow_dispatch' && format('Building for Spark {0}', inputs.spark-version) || ' '}}

.github/workflows/docs.yml

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+# Sample workflow for building and deploying a Jekyll site to GitHub Pages
+name: Documentation (build and deploy)
+
+on:
+  # Runs on pushes targeting the default branch
+  push:
+    branches: ["main"]    
+    paths: ["docs/**"]
+  pull_request:
+    branches: ["main"]    
+    paths: ["docs/**"]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: true
+
+jobs:
+  # Build job
+  build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: docs
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.1' # Not needed with a .ruby-version file
+          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+          cache-version: 0 # Increment this number if you need to re-download cached gems
+          working-directory: '${{ github.workspace }}/docs'
+      - name: Setup Pages
+        id: pages
+        uses: actions/configure-pages@v3
+      - name: Build with Jekyll
+        # Outputs to the './_site' directory by default
+        run: bundle exec jekyll build --baseurl "${{ steps.pages.outputs.base_path }}"
+        env:
+          JEKYLL_ENV: production
+      - name: Upload artifact
+        # Automatically uploads an artifact from the './_site' directory by default
+        uses: actions/upload-pages-artifact@v1
+        with:
+          path: "docs/_site/"
+
+  # Deployment job
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v2

.github/workflows/publish.yml

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+name: Publish
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version to publish (SemVer)'
+        type: string
+        required: true
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    env:
+      VERSION: ${{ inputs.version }}
+      GITHUB_REGISTRY_TOKEN: ${{ secrets.TOKEN }}
+    steps: 
+    - uses: actions/checkout@v4
+    - run: |
+        git config user.name "github-actions[bot]"
+        git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+    - uses: actions/setup-java@v3
+      with:
+        java-version: 8
+        distribution: "temurin"
+        cache: "sbt"
+    - run: sbt "release release-version ${VERSION} with-defaults"
+
+run-name: ${{ format('Publishing version {0}', inputs.version) }}