Add codex

Author: mono0x

src/dot_config/mise/config.toml

@@ -5,7 +5,8 @@ go = "1.25"
 node = "22"
 "npm:@anthropic-ai/claude-code" = "latest"
 "npm:@devcontainers/cli" = "latest"
-python = "latest"
+"npm:@openai/codex" = "latest"
+python = "3.13"
 usage = "latest"
 uv = "latest"