feat: 支持使用 TypeScript 和 CSS 预处理语言编写小程序原生页面/组件

[Hopsken]

Remax 已经支持了混合开发模式，这可以很方便将已有项目迁移到 Remax 或者在 Remax 项目使用小程序原生语法编写对性能要求较高的页面。

但是目前 Remax 在编译的时候只能够识别出 js 和小程序原生 css 格式的，对于使用 ts 编写的页面没有处理。对此，我做了一些调整，使得 Remax 在编译的时候能够正确处理原生的 TS 和 Less 文件。这样我们在 Remax 项目中使用小程序原生语法的时候仍能使用 TypeScript 书写逻辑代码，以及使用 Less / Sass / Stylus 等 CSS 预处理语言编写样式文件。

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[codecov]

Codecov Report

Merging #1512 (03287ae) into master (5adf05f) will increase coverage by 0.00%.
The diff coverage is 96.96%.

@@           Coverage Diff           @@
##           master    #1512   +/-   ##
=======================================
  Coverage   90.91%   90.91%           
=======================================
  Files         363      363           
  Lines        4401     4415   +14     
  Branches      677      677           
=======================================
+ Hits         4001     4014   +13     
- Misses        392      393    +1     
  Partials        8        8           

Impacted Files	Coverage Δ
...ackages/remax-cli/src/build/entries/NativeEntry.ts	94.64% <92.85%> (-1.52%)	⬇️
packages/remax-cli/src/build/NativeAssets.ts	91.39% <100.00%> (+0.18%)	⬆️
...ckages/remax-cli/src/build/entries/VirtualEntry.ts	93.10% <100.00%> (+0.24%)	⬆️
...x-cli/src/build/webpack/loaders/nativeComponent.ts	100.00% <100.00%> (ø)
packages/remax-cli/src/extensions.ts	100.00% <100.00%> (ø)

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