[Misc] Add Codex settings to gitignore (vllm-project#24493)

Signed-off-by: Roger Wang <[email protected]>
Co-authored-by: Roger Wang <[email protected]>

Author: ywang96

.gitignore

@@ -181,6 +181,10 @@ cython_debug/
 CLAUDE.md
 .claude/
 
+# Codex
+AGENTS.md
+.codex/
+
 # DS Store
 .DS_Store