Add codespell GitHub Actions workflow for automatic spelling checks

Co-authored-by: aaronpowell <434140+aaronpowell@users.noreply.github.com>

.github/workflows/codespell.yml

@@ -0,0 +1,22 @@
+name: Check Spelling
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  codespell:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Check spelling with codespell
+        uses: codespell-project/actions-codespell@v2
+        with:
+          check_filenames: true
+          check_hidden: false