Add CI

.github/workflows/deploy_snapshot.yml

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+# (c) https://github.com/MontiCore/monticore
+name: Deploy Snapshot
+
+
+concurrency: # run this test workflow only once per "branch"
+  group: ${{ github.repository }}-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+on:
+  push: # run this pipeline on every push
+    paths-ignore:
+      - "*.md" # do not run this pipeline if the only change was to markdown files
+    branches: [ "dev" ] # Only run on the default branch
+  repository_dispatch: # and on request of upstream projects
+    types: [ trigger_after_upstream_deploy ]
+
+env:
+  GRADLE_VERSION: 7.4 # Gradle version used
+  GRADLE_CLI_OPTS: "-Pci --build-cache" # CLI options passed to Gradle
+  GRADLE_BUILD_ACTION_CACHE_KEY_JOB: "test-cache-${{ github.head_ref }}.${{ github.sha }}"
+
+permissions:
+  contents: read 
+
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout project sources
+        uses: actions/checkout@v3
+      - name: Gradle build
+        uses: gradle/actions/setup-gradle@v3
+        with:
+          gradle-version: ${{env.GRADLE_VERSION}}
+          arguments: build ${{env.GRADLE_CLI_OPTS}}
+
+  deploy:
+    permissions:
+      packages: write
+    runs-on: ubuntu-latest
+    needs: build
+    if: github.ref == 'refs/heads/dev'
+    steps:
+      - name: Checkout project sources
+        uses: actions/checkout@v3
+      - name: Gradle publish
+        uses: gradle/actions/setup-gradle@v3
+        with:
+          gradle-version: ${{env.GRADLE_VERSION}}
+          arguments: publish ${{env.GRADLE_CLI_OPTS}} -PmavenPassword=${{ secrets.SE_NEXUS_PASSWORD }} -PmavenUser=${{ secrets.SE_NEXUS_USER }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+

.github/workflows/report_proposed_changes.yml

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+# (c) https://github.com/MontiCore/monticore
+name: Report Proposed Changes Test Results
+on:
+  workflow_run:
+    workflows: [ Test Proposed Changes ]
+    types: [ completed ]
+
+# Note: This is a separate workflow (file) to constrain the write permissions
+permissions:
+  checks: write
+
+jobs:
+  checks:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download Test Report
+        uses: dawidd6/action-download-artifact@20319c5641d495c8a52e688b7dc5fada6c3a9fbc
+        with:
+          name: junit-test-results
+          workflow: ${{ github.event.workflow.id }}
+          run_id: ${{ github.event.workflow_run.id }}
+      - name: Publish Test Report
+        uses: mikepenz/action-junit-report@a451de5ac1ff45e46508b6150cb4f51a287d0309
+        with:
+          commit: ${{github.event.workflow_run.head_sha}}
+          report_paths: '**/target/test-results/test/TEST-*.xml'

.github/workflows/test_branch.yml

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+# (c) https://github.com/MontiCore/monticore
+name: Test Proposed Changes
+
+concurrency: # run this test workflow only once per "branch"
+  group: ${{ github.repository }}-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+on:
+  push: # run this pipeline on every push
+    paths-ignore:
+      - "*.md" # do not run this pipeline if the only change was to markdown files
+    branches-ignore: [ "dev" ] # Do not run this on the default branch
+
+env:
+  GRADLE_VERSION: 7.4 # Gradle version used
+  GRADLE_CLI_OPTS: "-Pci --build-cache" # CLI options passed to Gradle
+  GRADLE_BUILD_ACTION_CACHE_KEY_JOB: "test-cache-${{ github.head_ref }}.${{ github.sha }}"
+
+permissions:
+  contents: read 
+
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout project sources
+        uses: actions/checkout@v3
+      - name: Gradle build
+        uses: gradle/actions/setup-gradle@v3
+        with:
+          gradle-version: ${{env.GRADLE_VERSION}}
+          arguments: build ${{env.GRADLE_CLI_OPTS}}
+      - name: Upload Test Report
+        uses: actions/upload-artifact@v3
+        if: always() # always run even if the previous step fails
+        with:
+          name: junit-test-results
+          path: '**/target/test-results/test/TEST-*.xml'
+          retention-days: 1
+
+
+  # Not a part of the MontiVerse