add spellchecking with codespell

Signed-off-by: Martin Schurz <Martin.Schurz@t-systems.com>

.github/workflows/codespell.yml

@@ -0,0 +1,21 @@
+---
+name: Codespell - Spellcheck
+
+on:  # yamllint disable-line rule:truthy
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  ansible-lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Codespell
+        # replace "master" with any valid ref
+        uses: codespell-project/actions-codespell@v1
+        with:
+          check_filenames: true