Started jobs to add a workflow to automate the testing process of the library

Author: jr20xx

.github/workflows/perform_testing.yml

@@ -0,0 +1,27 @@
+name: Run JCalc Tests
+
+on:
+    push:
+        branches: [ main ]
+    pull_request:
+        branches: [ main ]
+
+jobs:
+    test:
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Check the code
+              uses: actions/checkout@v4
+
+            - name: Setup JDK
+              uses: actions/setup-java@v4
+              with:
+                distribution: 'temurin'
+                java-version: '11'
+            
+            - name: Setup Gradle
+              uses: gradle/actions/setup-gradle@v4
+
+            - name: Run JUnit tests
+              run: ./gradlew test