Add GitHub Spellcheck Action

.github/workflows/spellcheck.yaml

@@ -0,0 +1,16 @@
+# https://www.javierbrea.com/blog/spellcheck-github-action/
+
+name: spellcheck
+on:
+  pull_request:
+jobs:
+  check-spelling:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Check Spelling
+        uses: rojopolis/[email protected]
+        with:
+          config_path: .spellcheck.yaml
+          task_name: Markdown

.spellcheck.yaml

@@ -0,0 +1,27 @@
+# https://www.javierbrea.com/blog/spellcheck-github-action/
+
+matrix:
+  - name: Markdown
+    expect_match: false
+    apsell:
+      mode: en
+    dictionary:
+      wordlists:
+        - .wordlist.txt
+      output: wordlist.dic
+      encoding: utf-8
+    pipeline:
+      - pyspelling.filters.markdown:
+          markdown_extensions:
+            - markdown.extensions.extra:
+      - pyspelling.filters.html:
+          comments: false
+          attributes:
+            - alt
+          ignores:
+            - ':matches(code, pre)'
+            - 'code'
+            - 'pre'
+            - 'blockquote'
+    sources:
+      - 'README.md'