add linting workflow

taken form https://github.com/usegalaxy-eu/usegalaxy-eu-tools/blob/1cd22e99d7fa68b9d98856fe7ede4aa1127dab07/.github/workflows/lint.yml

Author: martenson

.github/workflows/lint.yml

@@ -0,0 +1,33 @@
+name: Tool linting
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.11]
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Cache downloads
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: cache-${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+      - name: Perform linting
+        run: make pr_check