feat: add misspell workflow

Signed-off-by: Rui Chen <rui@chenrui.dev>

.github/workflows/misspell.yml

@@ -0,0 +1,18 @@
+name: Check spelling errors
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types: [assigned, opened, synchronize, reopened]
+jobs:
+  misspell:
+    name: runner / misspell
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code.
+        uses: actions/checkout@v4
+      - name: misspell
+        uses: reviewdog/action-misspell@v1
+        with:
+          locale: "US"