refactor: reduce glob-to-regexp dependency

[hai-x]

Summary

What kind of change does this PR introduce?

Move glob-to-regexp into core as lib/util/globToRegExp.js, specialized for watchpack's only call site (extended and globstar always enabled), and drop the runtime dependency.

Did you add tests for your changes?

Existing

Does this PR introduce a breaking change?

No

If relevant, what needs to be documented once your changes are merged or what have you already documented?

No

Use of AI

Yes

[changeset-bot]

⚠️ No Changeset found

Latest commit: f2f0ea9

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

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[codspeed-hq]

Merging this PR will not alter performance

✅ 36 untouched benchmarks

---

_{Comparing refactor-dep (f2f0ea9) with main (8869686)}

[codecov]

Codecov Report

❌ Patch coverage is 50.87719% with 56 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.91%. Comparing base (8869686) to head (f2f0ea9).

Files with missing lines	Patch %	Lines
lib/util/globToRegExp.js	48.57%	53 Missing and 1 partial ⚠️
lib/index.js	77.77%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #312      +/-   ##
==========================================
- Coverage   95.87%   91.91%   -3.97%     
==========================================
  Files           7        8       +1     
  Lines        1189     1299     +110     
  Branches      352      384      +32     
==========================================
+ Hits         1140     1194      +54     
- Misses         44       99      +55     
- Partials        5        6       +1     

Flag	Coverage Δ
integration	91.91% <50.87%> (-3.97%)	⬇️

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