feat: improve lazy compilation options for single entry

[chenjiahan]

Summary

If there is only one entry, do not enable lazy compilation for entries, this can reduce the rebuild time and provide better DX.

Related Links

• fix(lazyCompilation): use { entries: false } for better DX rspress#2286

Checklist

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

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[Copilot]

Pull Request Overview

This PR improves the lazy compilation options to optimize rebuild times when there is only a single entry. The changes include updating the documentation in both Chinese and English to describe the new behavior and modifying the core plugin to conditionally disable lazy compilation for entries in single-entry scenarios.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
website/docs/zh/config/dev/lazy-compilation.mdx	Added a comment explaining that the entries option is disabled by default for a single entry.
website/docs/en/config/dev/lazy-compilation.mdx	Added a similar comment in English to document the same behavior.
packages/core/src/plugins/lazyCompilation.ts	Introduced a conditional check to disable lazy compilation for entries when there's one entry.

Comments suppressed due to low confidence (1)

packages/core/src/plugins/lazyCompilation.ts:19

• [nitpick] Consider extending or explicitly documenting the handling of non-boolean truthy 'options' values if they are expected, to ensure clarity in the API's behavior.

if (options === true) {