Add spell check to docs

.github/workflows/pr-check.yaml

@@ -0,0 +1,39 @@
+name: Pull Request Checks
+
+on:
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  spellcheck:
+    name: Spellcheck
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/[email protected]
+      name: Checkout
+    - uses: jitterbit/get-changed-files@v1
+      id: changed_files
+      name: Get changed files
+    - id: md_changed_files
+      name: Spellcheck Markdown files
+      run: |-
+        files=''
+        for f in ${{ steps.changed_files.outputs.all }}
+        do
+          ext="${f##*.}"
+          if [ $ext = "md" || $ext = "mdx" ];
+          then
+            files="${f} ${files}"
+          fi
+        done
+
+        echo "files=${files}" >> $GITHUB_ENV
+    - uses: rojopolis/[email protected]
+      name: Spellcheck
+      if: ${{ env.files }}
+      with:
+        source_files: ${{ env.files }}
+        task_name: Markdown