Prune the react-native tree from the published shrinkwrap #1962

The registry-install half of #1937.alasql's optional react-native-fs dependency peer-depends on react-native, which npm auto-installs — ~140MB and ~200 packages of code unreachable under Node. The published 5.1.23 shrinkwrap pins 794 packages, 64 of them react-native/hermes/metro.Strip the subtree from the shrinkwrap that ships in the published package, alongside the existing dev prune (#1783). npm honours overrides only for the root project, so they cannot help a consumer; the published shrinkwrap is authoritative for registry installs, which makes it the lever that actually reaches users — no stub package or third-party empty module needed.Covers npm install harper from the registry. The Docker image is not covered: it installs from a local tarball, which has no packument, so npm never learns the shrinkwrap exists. That is #1960.Fixed by #1959.

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