Fix Codex browse runtime on Windows

[Catfish-75]

Summary

• install the browse runtime assets that the Codex skill needs on Windows, including browse/src, browse/bin, browse/dist, and externalized Node runtime packages
• make browse stop handle shutdown before ensureServer() so a clean stop cannot cold-start a daemon
• preserve cold-start command output on stdout and avoid delayed default startup banners after stop
• add focused regression coverage for the Windows Codex dispatch/runtime setup path

Verification

• bun test browse/test/config.test.ts
• git diff --check -- browse/src/cli.ts browse/test/commands.test.ts browse/test/config.test.ts setup test/gen-skill-docs.test.ts
• Installed Codex runtime smoke-tested from outside the repo with browse.exe stop, status, goto http://localhost:5173, snapshot -i, and final stop

Notes

Manual bun test browse/test/commands.test.ts still times out in the Windows BrowserManager/Playwright launch path. That file is already excluded from the curated Windows-safe shard as POSIX/Playwright-fragile, so this PR keeps the runtime fix focused instead of broadening the test harness change.