codespell: Add codespell configuration, CI and precommit.

Signed-off-by: Jos Verlinde <Jos.Verlinde@Microsoft.com>

Author: Josverl

.github/workflows/codespell.yml

@@ -0,0 +1,13 @@
+name: Check spelling with codespell
+
+on: [push, pull_request]
+
+jobs:
+  codespell:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v5
+    # codespell version should be kept in sync with .pre-commit-config.yml
+    - run: pip install --user codespell==2.4.1 tomli
+    - run: codespell
+

.pre-commit-config.yaml

@@ -13,3 +13,11 @@ repos:
     hooks:
       - id: ruff
         id: ruff-format
+
+  - repo: https://github.com/codespell-project/codespell
+    rev: v2.4.1
+    # version should be kept in sync with .github/workflows/codespell.yml & micropython repo
+    hooks:
+    - id: codespell
+      additional_dependencies:
+        - tomli

pyproject.toml

@@ -1,3 +1,14 @@
+[tool.codespell]
+count = ""
+ignore-regex = '\b[A-Z]{3}\b'
+ignore-words-list = "ans,asend,deques,dout,emac,extint,hsi,iput,mis,notin,numer,ser,shft,synopsys,technic,ure,curren,te,bu,curch,ist,clen,henc,shttp,unstall,ody"
+quiet-level = 3
+skip = """
+./.git,\
+**/test_*.py,\
+**/html.entities/html/entities.py,\
+"""
+
 [tool.ruff]
 extend-exclude = [
   "python-stdlib",