chore(create-objectstack): drop deprecated @types/tar devDependency

tar v7 ships its own TypeScript declarations, so the standalone @types/tar
stub is deprecated and redundant — it only emitted a `WARN deprecated
@types/tar@7.0.87` line on every `pnpm install`. `import * as tar from 'tar'`
now resolves against tar's bundled types; the package still builds and
type-checks clean, and dist/ is byte-identical.

devDependency-only, ships nothing (empty changeset — create-objectstack is in
the lockstep fixed group and must not drag the stack up a patch for a no-op).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: os-zhuang

.changeset/drop-deprecated-types-tar.md

@@ -0,0 +1,16 @@
+---
+---
+
+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).

packages/create-objectstack/package.json

@@ -26,7 +26,6 @@
   },
   "devDependencies": {
     "@types/node": "^26.1.1",
-    "@types/tar": "^7.0.87",
     "tsup": "^8.5.1",
     "typescript": "^6.0.3",
     "vitest": "^4.1.10"