Add codespell support (config, workflow to detect/not fix) and make it fix a typo

.github/workflows/codespell.yml

@@ -0,0 +1,23 @@
+# Codespell configuration is within pyproject.toml
+---
+name: Codespell
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+permissions:
+  contents: read
+
+jobs:
+  codespell:
+    name: Check for spelling errors
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Codespell
+        uses: codespell-project/actions-codespell@8f01853be192eb0f849a5c7d721450e7a467c579  # v2.2

pyproject.toml

@@ -40,7 +40,7 @@ ignore = [
   "TRY003", # Avoid specifying long messages outside the exception class
 
   # Excessive
-  "RET503", # implict return
+  "RET503", # implicit return
   "RET506", # elif after raise
   "PLR2004", # magic value used in comparison
 ]
@@ -63,3 +63,10 @@ required-imports = ["from __future__ import annotations"]
 
 [tool.ruff.lint.pydocstyle]
 convention = "pep257"
+
+[tool.codespell]
+# Ref: https://github.com/codespell-project/codespell#using-a-config-file
+skip = '.git,.gitignore,.gitattributes'
+check-hidden = true
+# ignore-regex = ''
+# ignore-words-list = ''