[xyrolle]

Fixes #3163

--tsgo / --incremental didn't emit components under symlinked directories, because the findFiles walk doesn't descend into them, so the project in #3163 checked no files. During the overlay emission, links that lead out of the workspace are now followed, keeping the link's path (withSymlinks({ resolvePaths: false })).

• Only the overlay emission follows links. The walk behind the default mode (openAllDocuments) stays as chore: switch from fast-glob to fdir #2433 left it.
• Links whose target is inside the workspace, or contains it, are still skipped. That keeps loops (VSCode Plugin does not handle symlinks correctly #2364) and duplicate walks out, but a component that include or an import reaches only through such a link stays unchecked, as before.
• A directory that can't be read during the walk is skipped, as fdir skips its own read errors.
• resolvePaths needs fdir 6.3, and the symlink loop fixes are in 6.4, so the range goes to ^6.4.6, which the lockfile already has.

Known limitations (reproduced; how common they are is unknown):

• Two links to the same outside folder are both emitted, so with an include that covers both, an error there is reported twice. The default mode reports it once.
• fdir's own loop check compares path prefixes, so some links nested inside a linked directory are skipped and their components stay unchecked (e.g. src -> ../shared plus shared/alias -> ../shared-other), as before.

Covering links inside the workspace and these cases needs a loop check that tells loops from aliases (likely in fdir) and de-duplication of the reported diagnostics that doesn't drop distinct ones. I'd like to agree on that direction before growing this PR.

Test: test-sanity.js makes a temporary project whose src links to a directory outside it (a junction on Windows) with a type error, and checks that --tsgo reports it. It fails on master. Root pnpm test passes. pnpm lint passes with #3161's ignore rules; without them it fails on generated files after pnpm test.

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Latest commit: 29abbc4

The changes in this PR will be included in the next version bump.

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