add grapheme-counter entry for fast counting

[cometkim]

extracted the shared category tables and pair-rule machine into an internal grapheme-core module, and adds unicode-segmenter/grapheme-counter

[changeset-bot]

🦋 Changeset detected

Latest commit: 3c51001

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
unicode-segmenter	Minor

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[codspeed-hq]

Merging this PR will not alter performance

✅ 6 untouched benchmarks
🆕 6 new benchmarks

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
🆕	grapheme-counter - Code snippet (combined)	N/A	42 µs	N/A
🆕	grapheme-counter - Demonic characters	N/A	32.2 µs	N/A
🆕	grapheme-counter - Emojis	N/A	18.4 µs	N/A
🆕	grapheme-counter - Hindi	N/A	25 µs	N/A
🆕	grapheme-counter - Lorem ipsum (ascii)	N/A	21.8 µs	N/A
🆕	grapheme-counter - Tweet text (combined)	N/A	27.4 µs	N/A

---

_{Comparing fast-counter (3c51001) with main (47953b4)}

[pkg-pr-new]

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npm i https://pkg.pr.new/unicode-segmenter@135

commit: 3c51001

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (47953b4) to head (3c51001).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #135   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            9        11    +2     
  Lines          933      1005   +72     
=========================================
+ Hits           933      1005   +72     

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