chore(examples): convert to the dotfile version of commitlint config file

examples/dotfiles/.commitlintrc.js

@@ -0,0 +1,3 @@
+// See https://commitlint.js.org/#/guides-local-setup .
+
+module.exports = {extends: ['@commitlint/config-conventional']}

examples/dotfiles/.lefthook.yml

@@ -41,6 +41,12 @@ pre-commit:
       runner: node
     "any.go":
       runner: go run
+
+commit-msg:
+  commands:
+    commitlint:
+      run: commitlint --edit
+
 pre-push:
   commands:
     packages-audit: