add Scala-CI workflow

.github/workflows/scala.yml

@@ -0,0 +1,27 @@
+name: Scala CI
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up JDK 17
+      uses: actions/setup-java@v3
+      with:
+        java-version: '17'
+        distribution: 'temurin'
+        cache: 'sbt'
+    - name: Compile
+      run: sbt compile
+    - name: Run tests
+      run: sbt test
+    - name: Build executable jar
+      run: sbt assembly && ./sc4pac --version