Add codespell GitHub Actions workflow for automatic spelling checks

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

.codespellrc

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+[codespell]
+# Ignore intentional misspellings used as examples and technical terms
+# numer - intentional example typo in add-educational-comments.prompt.md
+# wit - proper technical term/name (sardonic wit, Gilfoyle character trait)
+# aks - Azure Kubernetes Service (AKS) abbreviation
+# edn - Extensible Data Notation (Clojure data format)
+# ser - serialization abbreviation
+# ois - ObjectInputStream abbreviation in Java
+# gir - valid abbreviation/technical term
+# rouge - Rouge is a syntax highlighter (not "rogue")
+# categor - appears to be a partial word in code
+# aline - proper name (Aline Ávila)
+# ative - appears in context of "native" alternatives
+ignore-words-list = numer,wit,aks,edn,ser,ois,gir,rouge,categor,aline,ative,afterall,deques
+# Skip certain files and directories
+skip = .git,node_modules,package-lock.json,*.lock,website/build,website/.docusaurus

.github/workflows/codespell.yml

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+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