feat: add Glob validator with gitignore-style pattern matching

[HarshMN2345]

No description provided.

[greptile-apps]

Greptile Summary

This PR introduces a new Globstar validator that accepts gitignore-style glob patterns and matches strings against them using a pure-PCRE engine built from scratch — no dependency on fnmatch(). The two-phase inclusion/exclusion logic (literal inclusions win unconditionally in step 1; wildcard patterns use last-match-wins in step 2) is well-structured and backed by a thorough test suite.

• src/Validator/Globstar.php: new validator with support for *, **, ?, [abc] character classes, \\ escapes, and ! exclusion prefixes, all converted to PCRE.
• tests/Validator/GlobstarTest.php: 40+ test methods covering pure inclusions, pure exclusions, mixed modes, re-inclusion chains, edge-case bracket classes, and escaped characters.

Confidence Score: 4/5

Safe to merge with the noted edge-case fixes; core matching logic is correct for all tested patterns.

The regex construction and two-phase inclusion/exclusion logic are correct for all tested scenarios. Two small gaps exist: escape sequences inside bracket classes are not handled, and the middle-** regex fragment relies on greedy backtracking rather than explicit segment-boundary repetition. Neither affects common usage patterns.

The matchGlobstar method in src/Validator/Globstar.php, specifically the bracket-class inner-loop and the middle-** regex fragment.

Important Files Changed

Filename	Overview
src/Validator/Globstar.php	New Globstar validator implementing gitignore-style glob matching via PCRE regex construction. Core logic is sound and well-tested; minor issues with docblock class name, \] escape handling inside bracket classes, and the (?:.+/)? regex fragment for middle ** relying on PCRE backtracking rather than an explicit segment-boundary quantifier.
tests/Validator/GlobstarTest.php	Comprehensive test suite covering empty patterns, pure inclusions, pure exclusions, mixed modes, all wildcard forms, character classes (including negation and edge cases), escaped characters, and real-world path patterns. No test for \] inside a bracket class.

_{Reviews (6): Last reviewed commit: "rename: Glob -> Globstar" | Re-trigger Greptile}