feat: add codeowners

.github/CODEOWNERS

@@ -0,0 +1,14 @@
+# CODEOWNERS: https://help.github.com/articles/about-codeowners/
+
+# Everything goes through the following "global owners" by default. Unless a
+# later match takes precedence, they will be requested for review when someone
+# opens a PR. Note that the last matching pattern takes precedence, so global
+# owners are only requested if there isn't a more specific codeowner specified
+# below. For this reason, the global codeowners are often repeated in
+# package-level definitions.
+
+*     @noble-assets/engineering
+
+# CODEOWNERS for the CODEOWNER file
+
+/.github/CODEOWNERS @johnletey