add workflow

.github/workflows/typo-checker.yml

@@ -0,0 +1,12 @@
+name: Typo Checker
+on: [pull_request]
+
+jobs:
+  run:
+    name: Spell Check with Typos
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout Actions Repository
+      uses: actions/checkout@v2
+    - name: Check spelling of the entire repository
+      uses: crate-ci/[email protected]