fix : change the logic for monorepo package detect

[yewanting]

What type of PR is this?

fix : A bug fix and reafactor

Check the PR title.

fix: modify monorepo package detection and parsing logic

(Optional) Translate the PR title into Chinese.

fix: 修改 monorepo 包检测逻辑和解析逻辑

(Optional) More detailed description for this PR(en: English/zh: Chinese).

en:
Core Logic Changes

• Before : isMonorepo() differentiated between various monorepo types (Eden, pnpm, Lerna) by checking specific configuration files (eden.monorepo.json, pnpm-workspace.yaml, lerna.json, etc.) ; Applied different logic based on the detected monorepo type
• Now : isMonorepo() uniformly determines monorepo status by counting package.json files (>= 2 package.json files means it's a monorepo); Uses a unified package.json discovery mechanism, ignoring monorepo types

zh:
核心逻辑变更

• 之前 : isMonorepo() 区分 Eden、pnpm、Lerna 等不同 monorepo 类型，通过检查特定的配置文件（eden.monorepo.json、pnpm-workspace.yaml、lerna.json 等）；根据不同的类型去做不同的逻辑判断
• 现在 : isMonorepo() 统一通过计算 package.json 文件数量来判断（>= 2 个 package.json 即为 monorepo)； 统一使用 package.json 检测机制，忽略 monorepo 类型

(Optional) Which issue(s) this PR fixes:

Some EMO projects were parsed inaccurately

[angrychow]

LGTM