refactor(helpers): avoid importing helpers via barrel files

[chenjiahan]

Summary

Move helper functions into dedicated modules (fs, path, stats, vendors) to avoid importing helpers via barrel files.

This helps avoid occasional circular dependency issues when using Rstest.

Checklist

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

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[Copilot]

Pull Request Overview

This PR refactors the helper functions organization by moving them from barrel file exports into dedicated modules (fs, path, stats, vendors) to avoid circular dependency issues when using Rstest.

• Reorganized helper functions into dedicated modules instead of a single barrel export
• Updated import statements across files to import from specific helper modules
• Removed wildcard exports from the main helpers index file

Reviewed Changes

Copilot reviewed 30 out of 30 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/core/src/helpers/index.ts	Removed barrel exports and kept only core exports
packages/core/src/server/watchFiles.ts	Updated imports to use specific helper modules
packages/core/src/server/socketServer.ts	Changed import to use vendors helper module
packages/core/src/server/proxy.ts	Updated requireCompiledPackage import path
packages/core/src/server/prodServer.ts	Split imports between path and vendors helpers
packages/core/src/server/overlay.ts	Updated toRelativePath import to path helper
packages/core/src/server/middlewares.ts	Split imports between main helpers and stats
packages/core/src/server/helper.ts	Updated getCommonParentPath import to path helper
packages/core/src/server/devServer.ts	Separated vendor helper imports
packages/core/src/server/devMiddlewares.ts	Updated requireCompiledPackage import path
packages/core/src/server/browserLogs.ts	Split imports between main helpers and vendors
packages/core/src/server/assets-middleware/setupOutputFileSystem.ts	Updated requireCompiledPackage import path
packages/core/src/server/assets-middleware/middleware.ts	Updated requireCompiledPackage import path
packages/core/src/provider/initConfigs.ts	Split imports between main helpers and path
packages/core/src/provider/helpers.ts	Updated stats helper exports
packages/core/src/provider/createCompiler.ts	Separated stats helper imports
packages/core/src/plugins/server.ts	Updated dedupeNestedPaths import to path helper
packages/core/src/plugins/manifest.ts	Updated requireCompiledPackage import path
packages/core/src/plugins/html.ts	Updated isFileExists import to fs helper
packages/core/src/plugins/fileSize.ts	Split imports between main helpers and stats
packages/core/src/plugins/cleanOutput.ts	Updated emptyDir import to fs helper
packages/core/src/plugins/cache.ts	Split imports between main helpers and fs
packages/core/src/plugins/bundleAnalyzer.ts	Updated requireCompiledPackage import path
packages/core/src/plugins/appIcon.ts	Split imports between main helpers, fs, and vendors
packages/core/src/pluginHelper.ts	Updated requireCompiledPackage import path
packages/core/src/loader/transformLoader.ts	Updated requireCompiledPackage import path
packages/core/src/loadEnv.ts	Split imports between main helpers and fs
packages/core/src/defaultConfig.ts	Split imports between main helpers and fs
packages/core/src/createRsbuild.ts	Updated isEmptyDir import to fs helper
packages/core/src/cli/init.ts	Split imports between main helpers and path

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