Add codespell workflow

Author: sunsided

.codespellrc

@@ -0,0 +1,3 @@
+[codespell]
+ignore-words-list = crate
+skip = .git,*.lock

.github/workflows/codespell.yml

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+---
+name: Codespell
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+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