test: run knip also in strict mode to find wrongly assigned dev deps

Author: essenmitsosse

package.json

@@ -17,7 +17,7 @@
     "dev:docs": "pnpm run --filter npmx-docs dev --port=3001",
     "i18n:check": "node scripts/compare-translations.ts",
     "i18n:check:fix": "node scripts/compare-translations.ts --fix",
-    "knip": "knip",
+    "knip": "knip && knip --strict",
     "knip:fix": "knip --fix",
     "lint": "oxlint && oxfmt --check",
     "lint:fix": "oxlint --fix && oxfmt",
@@ -115,6 +115,7 @@
     "oxfmt": "0.27.0",
     "oxlint": "1.42.0",
     "playwright-core": "1.58.0",
+    "react": "19.2.4",
     "schema-dts": "1.1.5",
     "simple-git-hooks": "2.13.1",
     "typescript": "5.9.3",