fix(test): restore full test suite on Windows

[SahilRakhaiya05]

Fixes 10 Windows-only test failures so the Vitest suite runs cleanly on Windows dev machines. Linux/macOS CI behavior is unchanged.

Windows result:

• 1416 passing
• 3 skipped intentionally on Windows only

What changed

• Fixed resolveBundleDir to strip both / and \ trailing separators while preserving roots like C:\ and /.
• Updated subprocess tests to set both HOME and USERPROFILE so credentials stay inside the test temp directory on Windows.
• Replaced Unix-only rm usage with unlinkSync().
• Added test/helpers/execNpm.ts so npm subprocess calls work on Windows .cmd shims.
• Fixed CRLF handling in frontmatter parsing by stripping trailing \r.
• Added .gitattributes to normalize line endings to LF.
• Skipped symlink tests only when the OS cannot create symlinks.
• Skipped Unix 0600 chmod assertions on Windows because NTFS does not enforce POSIX file modes.
• Replaced Unix-only path assertions with path.resolve(), path.join(), and homedir() based checks.

Test Plan

• npm test — 1416 passed, 3 skipped on Windows only
• npm run typecheck
• npm run lint
• Subprocess suite — 49/49 passed
• Help snapshot suite — passed

Skipped on Windows by design:

• 2 symlink tests requiring Developer Mode/elevation
• 1 chmod 0600 test due to NTFS behavior

[ruili-testsprite]

Thanks for this, @SahilRakhaiya05 — this is a clean, well-scoped fix and the PR description is excellent. We'd like to merge it. Two required items and one optional nit before we can:

1. format:check will fail CI (required)

Our CI runs npm run format:check (Prettier), and two new files are missing a trailing newline:

• test/helpers/execNpm.ts
• .gitattributes

Please run npm run format and commit the result — that should make the check green. (You ran npm run lint, which is ESLint; Prettier is a separate step here.)

2. Please rebase onto latest main (required)

We've cut a couple of releases since you opened this, so the branch now conflicts. The only conflict is in test/cli.subprocess.test.ts:

git fetch origin
git rebase origin/main
# resolve test/cli.subprocess.test.ts, then:
git push --force-with-lease

3. Optional nit — dead branch in stripTrailingSeparators (src/lib/bundle.ts)

This line is unreachable and can be dropped:

if (end === 1 && rawPath[0] === '/') break;

The while (end > 1 ...) guard means end is never 1 at that check, and the rawPath.length <= 1 early return already covers a bare /. Totally fine to leave it if you'd rather not touch it — just flagging.

The drive-root handling (C:\) and the multi-separator stripping all look correct. Thanks again for improving the Windows story here! 🙏

[SahilRakhaiya05]

Thanks for the review and the kind feedback!

• Fixed trailing newlines in test/helpers/execNpm.ts and .gitattributes (npm run format)
• Rebased onto latest main (v0.1.2); resolved test/cli.subprocess.test.ts (upstream command renames + our Windows fixes)
• Dropped the unreachable branch in stripTrailingSeparators