Replace Babel and esbuild with Yuku

[hardfist]

Summary

This is an experimental test to test the perf gain

• Replace the plugin's Babel/esbuild/es-module-lexer paths with Yuku parser, codegen, and analyzer usage.
• Keep the existing internal compatibility surface while moving route transforms, export scanning, and route chunk analysis onto Yuku.
• Add pnpm bench:yuku to compare the previous HEAD implementation with the current Yuku-backed implementation.

Performance

Benchmark command: pnpm bench:yuku

Benchmark: 250 iterations across 24 TSX route samples
Node: v24.16.0

metric              before ms   after ms   speedup
transform              83.92     12.66     6.63x
export scan             2.05      4.43     0.46x
route transform       215.34     28.73     7.49x
route chunks           35.94     12.08     2.98x
total                 337.25     57.89     5.83x

Validation

• pnpm build
• pnpm test:core
• pnpm bench:yuku

[pkg-pr-new]

Open in StackBlitz

pnpm add https://pkg.pr.new/rsbuild-plugin-react-router@9887c23

commit: 9887c23

[ScriptedAlchemy]

Closing this in favor of #39, which now contains the Yuku parser/codegen work plus the broader route artifact/cache performance optimizations in a single PR.

[chenjiahan]

Is Yuku production ready? It still looks like a very new project