CI's check-config-allowlist failed on the new daytona-runcode showcase.
Rather than just adding an .mjs row, convert to .ts to match the
dominant pattern across examples/showcases/* (the .mjs predates the
Next 14 TS-config support and is only kept in a handful of older
showcases — banking, enterprise-brex, orca, presentation). New
showcases should follow the .ts convention.
- Replace examples/showcases/daytona-runcode/next.config.mjs with an
equivalent next.config.ts (empty config, same behavior).
- Add the new path to .github/config-allowlist.txt in alphabetical
position (between chatkit-studio/.../world and deep-agents-finance-erp).
- Verified locally: bash .github/scripts/check-config-allowlist.sh passes.
OSS-222