Add CODEOWNERS file
Since this repository contains style guides managed by different owners/teams, it might be convenient to have a way to allow maintainers to get notified about PRs for specific files. GitHub's code owners feature provides a way to do that:
Adding myself to this for the Lisp Style Guide.
diff --git a/CODEOWNERS b/CODEOWNERS
new file mode 100644
@@ -0,0 +1,3 @@