Update autograding workflow

.github/workflows/classroom.yml

@@ -0,0 +1,27 @@
+name: Autograding Tests
+on:
+  - push
+  - workflow_dispatch
+  - repository_dispatch
+permissions:
+  checks: write
+  actions: read
+  contents: read
+jobs:
+  run-autograding-tests:
+    runs-on: ubuntu-latest
+    if: github.actor != 'github-classroom[bot]'
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.7
+
+      - name: Install pycparser
+        run: pip install pycparser tabulate psutil
+
+      - name: Run tests
+        run: ./check