chore: adds codeowners

.github/CODEOWNERS

@@ -0,0 +1,13 @@
+# Lines starting with '#' are comments.
+# Each line is a file pattern followed by one or more owners.
+
+# These owners will be the default owners for everything in the repo.
+*       @simonecorsi
+
+# Order is important. The last matching pattern has the most precedence.
+# So if a pull request only touches javascript files, only these owners
+# will be requested to review.
+# *.js    @octocat @github/js
+
+# You can also use email addresses if you prefer.
+# docs/*  docs@example.com