CP1.2: owners in the crate README instead of a new CODEOWNERS file

craft-libs has no CODEOWNERS convention.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FypgCX8LsYYE8fsj4byBm2

.github/CODEOWNERS

@@ -1,4 +0,0 @@
-# craft-proof moved here from WordCraft's crates/proof; the WordCraft maintainers own it.
-# Confirm these handles before merge (WordCraft has no CODEOWNERS file to copy from).
-/crates/proof/ @dylanmtaylor @aiongg @skylartaylor
-/.github/workflows/proof.yml @dylanmtaylor @aiongg @skylartaylor

crates/proof/README.md

@@ -88,6 +88,10 @@ cargo check -p craft-proof --target wasm32-unknown-unknown
 
 CI: `.github/workflows/proof.yml`.
 
+## Owners
+
+WordCraft maintainers: echelon, dylanmtaylor, aiongg.
+
 ## Licence
 
 MIT OR Apache-2.0. The Language data carries its own licences, recorded in craft-i18n's