feat: add portable fp review skill installer

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2026-06-27 1ce0fd70b0d398b5a226a70f10fd5fc065a620fd

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{
  "package_id": "valid_pack",
  "files": [
    {
      "path": "data.txt",
      "sha256": "a1d706bceccbf6b7dd5ddc0969c6a7202b0fb8c3202c8e2419d599a4402c1973"
    }
  ]
}