🔧 Template: Add `precommit CI

Add a very basic pre-commit job to the Github Actions CI. Notes:

* We use the Hatch script defined in the `pyproject.toml` to run the pre-commit. This
  makes it more likely that local and remote execution will be the same.
* We fix the Python version of the runner to have a more deterministic CI. This does
  mean we'll have to update it once Python 3.13 is no longer supported, but that'll be
  a while.

Author: mbercx

template/.github/workflows/.ci.yml

@@ -0,0 +1,20 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.13'
+
+      - name: Install Hatch
+        run: pip install --upgrade pip hatch
+
+      - name: Run pre-commit
+        run: hatch run precommit:run