chore(create-objectstack): drop the deprecated @types/tar devDependency
tar v7 ships its own TypeScript declarations (its types field points at
dist/commonjs/index.d.ts), so the standalone @types/tar package is
deprecated and redundant — it only emitted a WARN deprecated @types/tar line
on every pnpm install. import * as tar from 'tar' in src/index.ts now
resolves against tar's bundled types, and the package still builds and
type-checks clean.
devDependency-only change: it is not shipped to consumers and dist/ is
byte-identical, so this releases nothing (empty changeset, no version bump —
create-objectstack is in the lockstep fixed group and must not drag the
whole stack up a patch for a no-op).