Upstream #1965 moved the tsc --listFilesOnly machinery into
scripts/lib/tsc-program.mjs (shared with the new verify:dep-lockstep),
still spawning `npx` — which is ENOENT on Windows. Resolve the conflict
by taking upstream's factoring and porting the #1939 fix into the lib:
rawProjectListing and verify-typecheck-coverage's --showConfig pass now
spawn process.execPath with the cached, hard-failing tscEntry resolver
(exported from tsc-program.mjs). Fixture copies in both main tests pick
up the new lib import graph. verify:dep-lockstep now runs on Windows
too.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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