add flake8 configuration and PyLint workflow for code quality checks

Author: Pavan-Microsoft

.flake8

@@ -0,0 +1,5 @@
+[flake8]
+max-line-length = 88
+extend-ignore = E501
+exclude = .venv, frontend
+ignore = E203, W503, G004, G200

.github/workflows/pylint.yml

@@ -0,0 +1,37 @@
+name: PyLint
+
+on: 
+  push:
+    paths:
+      - 'content-gen/src/backend/**/*.py'
+      - 'content-gen/src/backend/requirements*.txt'
+      - '.flake8'
+      - '.github/workflows/pylint.yml'
+
+permissions:
+  contents: read
+  actions: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.11"]
+    steps:
+      - uses: actions/checkout@v6
+      
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v6
+        with:
+          python-version: ${{ matrix.python-version }}
+      
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r content-gen/src/backend/requirements.txt
+          pip install flake8  # Ensure flake8 is installed explicitly
+      
+      - name: Run flake8 and pylint
+        run: |
+          flake8 --config=.flake8 content-gen/src/backend  # Specify the directory to lint