## Summary
- Add `tsgo`-based `typecheck` scripts and matching `typecheck:tsc`
fallback scripts across the TypeScript packages.
- Wire the new `typecheck:tsc` task into Turbo so package-level
typecheck checks can run consistently.
- Update workspace and lockfile metadata to include
`@typescript/native-preview` and the new toolchain wiring.
- Remove redundant `baseUrl` settings from package tsconfig files where
they are no longer needed.
## Testing
- Not run (changes are limited to package scripts, tsconfig wiring, and
lockfile updates).
- Not run: `pnpm typecheck:tsc`
- Not run: `pnpm build`
- Not run: package-specific `typecheck` / `typecheck:tsc` commands in
`ts/packages/cli`, `ts/packages/core`, `ts/packages/json-schema-to-zod`,
and `ts/packages/providers/mastra`.
Rahul Tarak