TypeScript 6.0

TypeScript 6.0 is the final release built on the current JavaScript codebase, designed as a bridge to TypeScript 7.0, which will be rewritten in Go for native speed and parallel type-checking. It modernizes defaults with strict mode enabled, ESM-first approach, and ES2025 target, while adding new features like built-in Temporal API types and deprecating legacy patterns to facilitate a smooth transition to the upcoming native version.