ci: add spell check action

Author: soumyamahunt

.github/config/spellcheck.yml

@@ -0,0 +1,17 @@
+matrix:
+- name: Markdown
+  aspell:
+    lang: en
+    d: en_US
+  dictionary:
+    encoding: utf-8
+  pipeline:
+  - pyspelling.filters.markdown:
+  - pyspelling.filters.html:
+      comments: false
+      ignores:
+      - code
+      - pre
+  sources:
+  - '**/*.md'
+  default_encoding: utf-8

.github/workflows/main.yml

@@ -33,6 +33,15 @@ jobs:
       contents: read
       security-events: write
 
+  spell-check:
+    name: Run spell check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Spellcheck Action
+        uses: rojopolis/spellcheck-github-actions@0.24.0
+        with:
+          config_path: .github/config/spellcheck.yml
+
   swift-package-test:
     name: Run Swift Package Tests
     uses: ./.github/workflows/swift-package.yml