[workflows] Add sbt clean test to github workflow for prs (#4)

.github/workflows/pr.yml

@@ -1,6 +1,25 @@
 name: pr
 on: pull_request
 jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+      - name: Set up JDK
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '21'
+      - uses: actions/cache@v4
+        with:
+          path: |
+            ~/.sbt
+            ~/.coursier
+          key: ${{ runner.os }}-sbt-${{ hashfiles('**/build.sbt') }}
+      - name: Compile and run tests
+        run: sbt clean test
   formatting:
     runs-on: ubuntu-latest
     steps: