add gha based ci workflow

.github/workflows/ci.yml

@@ -0,0 +1,19 @@
+name: CI
+on:
+  pull_request:
+  push:
+  workflow_dispatch:
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup JDK
+        uses: actions/setup-java@v3
+        with:
+          distribution: temurin
+          java-version: 8
+          cache: sbt
+      - name: Build and Test
+        run: sbt -v +test