chore: Add a github action to check for typos

.github/workflows/ci.yml

@@ -31,6 +31,18 @@ jobs:
         command: fmt
         args: --all -- --check
 
+  typos:
+    name: Spell Check with Typos
+    needs: [style]
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout Actions Repository
+      uses: actions/checkout@v2
+
+    - name: Check the spelling of the files in our repo
+      uses: crate-ci/typos@master
+
   clippy:
     name: Run clippy
     needs: [style]

.typos.toml

@@ -0,0 +1,10 @@
+[default.extend-words]
+# Remove this once base64 gets correctly ignored by typos
+# Or if we're able to ignore certain lines.
+Fo = "Fo"
+BA = "BA"
+
+[files]
+# Our json files contain a bunch of base64 encoded ed25519 keys which aren't
+# automatically ignored, we ignore them here.
+extend-exclude = ["*.json"]