v1.20251213.0

What's Changed

• [chore] number of minor updates/modernizations to jsg code by @jasnell in https://github.com/cloudflare/workerd/pull/5683
• Python: Add from workers import env for top level env by @hoodmane in https://github.com/cloudflare/workerd/pull/5682

Full Changelog: https://github.com/cloudflare/workerd/compare/v1.20251212.0...v1.20251213.0