Merge pull request #741 from ftnext/action-rstcheck

Migrate rstcheck from TravisCI

.github/workflows/rstcheck.yml

@@ -0,0 +1,25 @@
+name: Ensure RST is well-formed
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  rstcheck:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+      - name: Install dependencies
+        run: |
+          python -m pip install rstcheck
+      - name: Run rstcheck
+        run: |
+          python -m rstcheck README.rst reference/*.rst