Added spellcheck CI/CD workflow pipeline.

Author: nthnn

.github/workflows/ci_spellcheck.yml

@@ -0,0 +1,22 @@
+name: Spellcheck CI/CD
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  spellcheck:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Spell check
+        uses: codespell-project/actions-codespell@master
+        with:
+          path: src/, examples/, library.json, library.properties, README.md