fix(prepare): only hande source file

[fz6m]

fix #10393

prepare 处理扩展名要反向思维，因为不清楚用户用了什么自定义文件 ext ，可能有自己的 loader 等，所以我们只处理 tsx 、ts 、jsx 、js 、没有扩展名 几种

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Name	Status	Preview	Comments	Updated
umi	⬜️ Ignored (Inspect)			Feb 6, 2023 at 8:20AM (UTC)

[codecov]

Codecov Report

Base: 29.29% // Head: 29.26% // Decreases project coverage by -0.03% ⚠️

Coverage data is based on head (e831fdb) compared to base (3c78dbe).
Patch coverage: 5.88% of modified lines in pull request are covered.

❗ Current head e831fdb differs from pull request most recent head f7408c2. Consider uploading reports for the commit f7408c2 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #10400      +/-   ##
==========================================
- Coverage   29.29%   29.26%   -0.03%     
==========================================
  Files         445      445              
  Lines       13006    13017      +11     
  Branches     3178     3183       +5     
==========================================
  Hits         3810     3810              
- Misses       8592     8600       +8     
- Partials      604      607       +3     

Impacted Files	Coverage Δ
...eset-umi/src/features/clientLoader/clientLoader.ts	0.00% <ø> (ø)
...ages/preset-umi/src/features/mpa/extractExports.ts	0.00% <ø> (ø)
...es/prepare/esbuildPlugins/esbuildExternalPlugin.ts	0.00% <0.00%> (ø)
...ges/preset-umi/src/features/ssr/builder/builder.ts	28.12% <100.00%> (ø)

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[sorrycc]

为啥 x.tsx 就是源码，会不会有 import 'foo/bar.js' 的场景？

[fz6m]

这个地方就是把不符合 ts / tsx / jsx / js / 无扩展名 的文件过滤掉（他们不需要被 prepare 分析内容）。至于具体的处理交给下面，即使是 foo/bar.js 也可以的。

相当于代替了手动维护扩展名过滤的逻辑，因为哪些是源码我们是已知的，但用户用了什么扩展名是未知的。

[sorrycc]

@PeachScript 在 father doctor 里有做过类似的，帮忙看下。

[PeachScript]

+1