✅ add test workflow to GitHub Actions for multiple OS and Python versions

Author: Paillat-dev

.github/workflows/lib-checks.yml

@@ -48,6 +48,7 @@ jobs:
           uv run codespell --ignore-words-list="groupt,nd,ot,ro,falsy,BU" \
           --exclude-file=".github/workflows/codespell.yml"
   ruff:
+    if: ${{ github.event_name != 'schedule' }}
     runs-on: ubuntu-latest
     steps:
       - name: "Checkout Repository"
@@ -93,3 +94,29 @@ jobs:
         run: mkdir -p -v .mypy_cache
       - name: "Run mypy"
         run: uv run mypy --non-interactive discord/
+  tests:
+    if: ${{ github.event_name != 'schedule' }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        python-version: ['3.13', '3.12', '3.11', '3.10']
+    steps:
+      - name: "Checkout Repository"
+        uses: actions/checkout@v4
+
+      - name: "Setup Python"
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: "Install uv"
+        uses: astral-sh/setup-uv@v6
+        with:
+          enable-cache: true
+
+      - name: Sync dependencies
+        run: uv sync --no-python-downloads --group dev
+
+      - name: "Run tests"
+        run: uv run tox