Route every package file selector (pack/publish, git-fetcher,
directory-fetcher, patch-commit, deploy, and the injected-copy writers)
through `pnpm-fs-packlist` (`select_package_files`,
`select_dir_package_files`, `packlist_dir`) and the shared internal
symlink admission and placement helpers in `pnpm_fs::internal_symlink`
(`admit_internal_symlink`, `resolve_symlink_placement`,
`recreate_internal_symlink`, `SymlinkTargets`, `AdmittedSymlink`).
Test `pnpm-fs-packlist` against `npm-packlist` and `@pnpm/fs.packlist`
on a generated `proptest` corpus (`generated_trees_match_npm_packlist`),
against `npm pack --dry-run --json` (`pack_matches_npm_pack_dry_run`,
run nightly in `cargo-equivalence.yml`), and across all file-selection
consumers (`every_file_selector_agrees_with_pack`). Keep deliberate
divergences in `DELIBERATE_DIVERGENCES` with witness tests.
Fix two bugs surfaced by the new tests:
1. Normalize string `bin` fields into an object in `@pnpm/fs.packlist`
before passing the manifest to `npm-packlist`.
2. Canonicalize symlink sources in `import_indexed_dir` when falling
back to importing an internal symlink to an unselected file as a
regular file, so hardlink imports link the target file rather than
the symlink inode.
Closes https://github.com/pnpm/tasks/issues/223
Zoltan Kochan
c89785b318