Adds CI pipeline code for PRs

.github/.workflows/ci.yml

@@ -0,0 +1,53 @@
+name: CI Pipeline
+
+on:
+  pull_request:
+    branches:
+      - "*"
+    paths-ignore:
+      - '[skip ci]'
+
+jobs:
+  fetch-repository:
+    uses: ./.github/workflows/reusable_checkout.yml
+
+  run-lint:
+    needs: fetch-repository
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.11
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -r requirements-dev.txt
+
+      - name: Run lint
+        run: |
+          python -m black --check .
+  
+  run-tests:
+    needs: fetch-repository
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        python-version: [3.11, 3.8]
+
+    steps:
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -r requirements-dev.txt
+
+      - name: Run tests
+        run: |
+          python -m pytest .

.github/.workflows/reusable_checkout.yml

@@ -0,0 +1,16 @@
+name: Reusable Checkout
+
+on:
+  workflow_call:
+
+jobs:
+  checkout:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+        with:
+          repository: ${{ github.repository }}
+          ref: ${{ github.ref }}
+          token: ${{ secrets.GITHUB_TOKEN }}
+          fetch-depth: 2