feat: support apply some build configs

[9aoy]

Summary

Support apply some build configs, based on rsbuild.

interface RstestConfig {
  plugins?: RsbuildConfig['plugins'];

  source?: Pick<
     RsbuildConfig['source'],
    'define' | 'tsconfigPath'
  >;

  resolve?: RsbuildConfig['resolve'];
}

TODO:

• support apply more build configs, such as output.cssModules、tools.rspack、tools.swc, etc.

Related Links

Checklist

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