perf: replace compiled imports with require

[chenjiahan]

Summary

Since the compiled packages are in CommonJS format, using require to import them avoids the performance overhead of cjs-module-lexer and improves startup performance.

• consolidate all compiled package imports into a single helper function
• remove async/await from package imports where possible
• add vendors.ts to manage compiled package types and exports

Profile

Before

After

Benchmark

Before

Name	Dev cold start	HMR	Prod build
Rsbuild 1.5.13	314ms	79ms	412ms

After

Name	Dev cold start	HMR	Prod build
Rsbuild 1.5.13	298ms	78ms	414ms

Related Links

nodejs/node#59913

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[Copilot]

Pull Request Overview

This PR optimizes startup performance by replacing ES module imports with CommonJS require calls for compiled packages. Since the compiled packages are in CommonJS format, using require avoids the performance overhead of Node.js's cjs-module-lexer and improves cold start times by ~16ms based on the benchmarks.

Key changes:

• Consolidate all compiled package imports into a single requireCompiledPackage helper function
• Remove async/await from package imports where possible to make functions synchronous
• Add vendors.ts to centrally manage compiled package types and exports

Reviewed Changes

Copilot reviewed 22 out of 22 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
packages/core/src/helpers/vendors.ts	New helper module with requireCompiledPackage function and type definitions
packages/core/src/helpers/index.ts	Export vendors and remove direct picocolors import
packages/core/src/server/*.ts	Replace async imports with synchronous requireCompiledPackage calls
packages/core/src/plugins/*.ts	Convert async plugin setup to synchronous using new helper
packages/core/src/loader/transformLoader.ts	Make source map merging synchronous
packages/core/rslib.config.ts	Update error message to reference new helper

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