## Summary
Upgrade the monorepo to TypeScript 7.0.2 and update package build
tooling for compatibility with the native compiler.
## Design
Package builds now use `tshy` 4, while the packages still using `tsup`
move to `tsdown`. The few scripts that depend on the legacy TypeScript
compiler API use an explicit TypeScript 6 alias; declaration portability
coverage invokes the TypeScript 7 CLI directly.
Turbo is updated so workspace tasks can read the regenerated pnpm
lockfile.
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Co-authored-by: devin-ai-integration[bot] <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Chris Arderne