ci: implement testing to github pipeline

.github/workflows/backend-linter-and-tester.yml

@@ -0,0 +1,26 @@
+name: Pylint
+on: [push]
+jobs:
+  Backend-Linter-and-Test:
+    runs-on: ubuntu-latest
+    env:
+      PYTHON_VERSION: "3.10.12"
+    defaults:
+      run:
+        working-directory: ./backend
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python $PYTHON_VERSION
+        uses: actions/setup-python@v3
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+      - name: Analysing the code with pylint
+        run: |
+          pylint $(git ls-files '*.py')
+      - name: Run tests
+        run: |
+          pytest

frontend/src/pages/Books/BookForm.tsx

@@ -104,6 +104,8 @@ const BookForm: React.FC = () => {
 
     return (
       <div className="col-span-12">
+        <h1 className="text-base font-semibold leading-7 text-gray-900">Book&apos;s Authors</h1>
+        <hr className="mb-4" />
         <Table {...tableProps} />
       </div>
     );