Fix optional trailing slash for prefix star fast path

[SparkUiX]

Summary

Align the prefix-star fast path with the full parser for an optional trailing slash. With default options, isMatch('foo/', 'foo*') returned false, while fastpaths: false returned true. The existing * behavior already accepts a/ unless strictSlashes is enabled.

The fast path now adds the optional slash only when its generated expression ends in an unescaped star. Escaped stars, strictSlashes: true, and paths with an additional segment keep their behavior.

This addresses the secondary fast-path divergence noted in #207. PR #208 handles the separate *.* case.

Reproduction and verification

• New regression test failed before the fix: 0 passing, 1 failing at assert(isMatch('foo/', pattern)).
• npx mocha test/stars.js --reporter dot: 18 passing.
• npm run mocha -- --reporter dot: 1999 passing.
• npm run lint and git diff --check: passed.
• Compared default and fastpaths: false for the affected patterns under default, strictSlashes, capture, bash, and Windows options: no remaining differences in the checked cases.

Prepared with OpenAI Codex assistance. The change has not yet received human review.

[jonschlinkert]

Prepared with OpenAI Codex assistance. The change has not yet received human review.

Not wasting time on this