perf: use arc

[Glyphack]

No description provided.

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 79.23077% with 27 lines in your changes missing coverage. Please review.

Project coverage is 64.07%. Comparing base (4ddc93f) to head (985ff95).

Files	Patch %	Lines
typechecker/src/type_evaluator.rs	60.78%	20 Missing ⚠️
typechecker/src/build.rs	88.63%	5 Missing ⚠️
typechecker/src/semantic_analyzer.rs	90.47%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #251      +/-   ##
==========================================
+ Coverage   63.88%   64.07%   +0.19%     
==========================================
  Files          31       31              
  Lines        6293     6258      -35     
==========================================
- Hits         4020     4010      -10     
+ Misses       2273     2248      -25     

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[codspeed-hq]

CodSpeed Performance Report

Merging #251 will improve performances by ×5.8

_{Comparing remove-path-clone (985ff95) with main (4ddc93f)}

Summary

⚡ 1 improvements
✅ 3 untouched benchmarks

Benchmarks breakdown

	Benchmark	main	remove-path-clone	Change
⚡	type_checker[test_data/types_very_fast.py]	1,041.5 ms	179.2 ms	×5.8