fix: duplicate_package_checker panic when no package.json is supplied

[sorrycc]

Before.

Building with mako for production...
● Mako ▨▨▨▨▨▨▨▨▨▨▨▨▨▨▨▨▨▨▨▨▨▨▨▨▨ (28%) transform_js transform_js                                                                thread 'Mako thread 10' panicked at crates/mako/src/plugins/duplicate_package_checker.rs:102:66:
called `Option::unwrap()` on a `None` value
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Rayon: detected unexpected panic; aborting
[1]    53972 abort      OKAM=  build

How to reproduce?

umi g page index
umi config set mako {}
umi build

Summary by CodeRabbit

• 新功能

  • 改进了重复包检查插件的功能，增强了对包信息的提取和检查。

• Bug 修复

  • 优化了对 package_json 的检查，避免了潜在的错误。

• 重构

  • 代码结构更清晰，提高了对缺失数据的处理能力。

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

此次更改主要集中在 DuplicatePackageCheckerPlugin 的 check_duplicates 方法上，优化了从模块图中提取包信息的方式。新实现通过检查 package_json 是否存在来避免潜在的解包错误，整体流程更加清晰且对缺失数据的处理更为稳健。尽管构造 PackageInfo 实例的逻辑未变，但插件的结构和目的仍然是识别和报告重复的包版本。

Changes

文件路径	更改摘要
crates/mako/src/plugins/...checker.rs	优化 check_duplicates 方法，改进 package_json 的提取方式，增强代码的稳健性。

Possibly related PRs

• feat: #1491 add duplicate package checker plugin #1496: 此PR引入了 DuplicatePackageCheckerPlugin，与本PR中 check_duplicates 方法的更改直接相关，均关注于检查重复包的功能。

Poem

在兔子洞里跳跃欢，
重复包不再烦。
检查方法更聪明，
代码流畅如春风。
感谢小小的改动，
让我们一起欢庆这时光！ 🐰✨

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.97%. Comparing base (0652492) to head (3ec038c).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1621      +/-   ##
==========================================
+ Coverage   61.95%   61.97%   +0.01%     
==========================================
  Files         154      154              
  Lines       15412    15412              
==========================================
+ Hits         9549     9551       +2     
+ Misses       5863     5861       -2     

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