Add codespell workflow (replaces misspell) (#129)

.codespellrc

@@ -0,0 +1,4 @@
+[codespell]
+skip = .git
+# some modules, parts of regexes, and variable names to ignore
+ignore-words-list = aks

.github/workflows/codespell.yml

@@ -0,0 +1,21 @@
+name: Codespell
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  codespell:
+    name: Check for spelling errors
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+    - name: Codespell
+      uses: codespell-project/actions-codespell@v2