feat: added sql linting and license validation to ci

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         pg:
           - 16
-          
+
     name: PostgreSQL ${{ matrix.pg }}
     runs-on: ubuntu-latest
     container: pgxn/pgxn-tools
@@ -21,4 +21,36 @@ jobs:
       - name: Check out the repo
         uses: actions/checkout@v4
       - name: Test on PostgreSQL ${{ matrix.pg }}
-        run: pg-build-test
+        run: pg-build-test
+
+  lint:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.10"]
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v3
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Cache requirements
+      uses: actions/cache@v3
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-pip-
+    - name: Install requirements
+      if: steps.cache.outputs.cache-hit != 'true'
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+    - name: Analysing the SQL code
+      run: |
+        sqlfluff lint --dialect postgres ./ 
+    - name: Analysing Licenses
+      run: |
+        reuse lint