pyproject.toml: Add codespell configuration, CI and precommit.

Add the codespell configuration based on the micropython/micropython repo.

Configuration added:
- pyproject.toml: codespell configuration with ignore-words stored in
  tools/ignore_words.txt and enabling of codespell ignore blocks.
- .github/workflows/codespell.yml: GitHub action runs on Push and PR.
- .pre-commit-config.yaml: runs codespell on commit.

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
+    # version should be kept in sync with .github/workflows/codespell.yml & micropython repo
+    rev: v2.4.1
+    hooks:
+    - id: codespell
+      additional_dependencies:
+        - tomli

pyproject.toml

@@ -1,3 +1,13 @@
+[tool.codespell]
+count = ""
+ignore-regex = '\b[A-Z]{3}\b'
+ignore-multiline-regex = "# codespell:ignore-begin *\n.*# codespell:ignore-end *\n"
+ignore-words = "tools/ignore_words.txt"
+quiet-level = 3
+skip = """
+./.git,\
+"""
+
 [tool.ruff]
 extend-exclude = [
   "python-stdlib",

tools/ignore_words.txt

@@ -0,0 +1,12 @@
+# non-words to be ignored by codespell
+# shared with micropython/micropython
+asend
+ure
+
+# Specific to micropython/micropython-lib
+bu
+curch
+ist
+clen
+shttp
+ody