chore: add root lint/typecheck scripts; drop dead lint scripts

`pnpm run lint` / `pnpm run typecheck` now work from the repo root
(recursive, matching the existing `build`/`test` pattern) — no need to know
which package to cd into. Removed the phantom `lint` scripts from data-sync
and data-persistence: they had no eslint config or dependency and always
errored, which would otherwise break the recursive root lint. CI already
lints only @adobe/data, so nothing relied on them.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: krisnye

package.json

@@ -5,6 +5,9 @@
   "scripts": {
     "build": "pnpm -r run build",
     "test": "pnpm -r run test",
+    "lint": "pnpm -r run lint",
+    "lint-fix": "pnpm -r run lint-fix",
+    "typecheck": "pnpm -r run typecheck",
     "dev": "pnpm -r --parallel run dev",
     "dev:data": "pnpm --filter @adobe/data run dev",
     "link": "pnpm -r --filter @adobe/data* run link",

packages/data-persistence/package.json

@@ -18,7 +18,6 @@
         "build": "cp ../../LICENSE . 2>/dev/null || true; tsc -b",
         "clean": "rm -rf dist node_modules",
         "dev": "tsc -b -w --preserveWatchOutput",
-        "lint": "pnpm eslint .",
         "test": "pnpm exec playwright install chromium && vitest --run",
         "test:node": "vitest --run --project=node",
         "test:browser": "vitest --run --project=browser",

packages/data-sync/package.json

@@ -18,7 +18,6 @@
         "build": "cp ../../LICENSE . 2>/dev/null || true; tsc -b",
         "clean": "rm -rf dist node_modules",
         "dev": "tsc -b -w --preserveWatchOutput",
-        "lint": "pnpm eslint .",
         "test": "vitest --run --project=node",
         "test:node": "vitest --run --project=node"
     },