chore: add codeowners file (#3129)

hjr3 · web-flow · commit b7d5b3b66716 · 2024-06-19T09:35:09.000-05:00
This makes it clear who is maintaining which package. This will also
allow commit privileges for a specific package instead of the entire
repo.
diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
@@ -0,0 +1 @@
+/packages/pg-connection-string @hjr3
