refactor(transform): transformer use Traverse

[overlookmotel]

Sliced off from #3152.

This switches the transformer over to use Traverse instead of VisitMut.

This is incomplete - scopes are not implemented yet. At present, no transforms use scopes anyway, so all tests pass, but regardless I don't think should be merged until the implementation is complete.

[overlookmotel]

• fix(transform): implement transform-react-display-name with bottom-up lookup #3183
• refactor(transform): transformer use Traverse #3182 👈
• main

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[codspeed-hq]

CodSpeed Performance Report

Merging #3182 will degrade performances by 3.69%

_{Comparing 05-06-refactor_transform_transformer_use_Traverse_ (4222e67) with main (762677e)}

Summary

❌ 2 regressions
✅ 25 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	05-06-refactor_transform_transformer_use_Traverse_	Change
❌	transformer[checker.ts]	345.6 ms	356.4 ms	-3.04%
❌	transformer[pdf.mjs]	105 ms	109 ms	-3.69%

[overlookmotel]

We discussed and agreed to merge as is without scopes support, and to add that later on in a separate PR.