Summary

A basic implementation of dts generation in Rslib.

• bundleless dts: ts compiler API
• bundle dts: ts compiler API and api-extractor rollup

This feature is implemented via rsbuild-plugin-dts, and the dts generation is running in a new forked process.

This PR already implemented:

• using new process to run dts generation and do not block js bundle multicompiler
• support ts watch compiler API in rsbuild watch mode
• basic tests for dts bundle and bundleless

There are some other features related to dts, which will be implemented in separated PR later in the future.

• optimize log output
• tests covering more configurations
• support incremental build with project reference
• support external packages when using api-extractor
• deal alias in bundless dts
• support autoExtension for dts files (.d.ts with esm format and .d.cts with cjs format when type: module .d.ts with cjs format and .d.mts with esm format when type: commonjs)
• support using swc iso to generate dts when isolatedDeclarations enabled

Related Links

Checklist

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