feat: support esm file loader

[czy88840616]

有比较大量的改动，esm 和 cjs 有较大的差距，主要体现在文件加载方式中

• 1、通过 package.json 来判断是否走 esm 还是 commonjs，影响 bootstrap 和 mock 包的启动逻辑
• 2、调整加载文件的方式，不能再使用 safeRequre，换成 loadModule，这将导致启动逻辑变为异步，不支持 egg
• 3、不能在代码中出现 __dirname，__filename 逻辑，esm 不支持
• 4、不能使用动态 require 方式加载包，得用 loadModule
• 5、影响数据库之类的组件 models 加载
• 6、为了简化组件中加载文件，增加当前使用的是 esm 还是 commonjs 的 API
• 7、移除 node14 的 ci 环境

related: #1416

[codecov-commenter]

Codecov Report

Patch coverage: 75.00% and project coverage change: +2.33% 🎉

Comparison is base (c6d8317) 81.83% compared to head (d9abd97) 84.17%.
Report is 18 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3045      +/-   ##
==========================================
+ Coverage   81.83%   84.17%   +2.33%     
==========================================
  Files         438      469      +31     
  Lines       15936    44064   +28128     
  Branches     3773     5312    +1539     
==========================================
+ Hits        13042    37091   +24049     
- Misses       2626     6936    +4310     
+ Partials      268       37     -231     

Files Changed	Coverage Δ
packages/bootstrap/src/index.ts	100.00% <ø> (ø)
packages/bootstrap/src/util.ts	82.00% <ø> (-5.10%)	⬇️
packages/bootstrap/src/bootstrap.ts	22.70% <16.66%> (+14.51%)	⬆️
packages/info/src/utils.ts	80.39% <20.00%> (-15.77%)	⬇️
packages/core/src/common/fileDetector.ts	70.09% <33.69%> (-29.91%)	⬇️
packages/mock/src/utils.ts	64.70% <60.00%> (-0.61%)	⬇️
packages/mock/src/creator.ts	76.39% <76.36%> (+5.60%)	⬆️
packages/core/src/util/index.ts	85.01% <80.64%> (+1.23%)	⬆️
packages/core/src/setup.ts	66.07% <87.34%> (-29.08%)	⬇️
packages/core/src/context/container.ts	95.01% <95.00%> (+0.02%)	⬆️
... and 14 more

... and 392 files with indirect coverage changes

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[waitingsong]

开始做 esm 支持了哇。
feat 功能完成后能不能提供一个（页面）文档的链接方便了解此功能

[czy88840616]

@waitingsong minor 版本有发布介绍，文档也会更新。