feat: 新增 rootDir 配置，允许设置源码目录

[yesmeck]

No description provided.

[codecov]

Codecov Report

Merging #262 into master will decrease coverage by <.01%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master     #262      +/-   ##
==========================================
- Coverage   86.36%   86.35%   -0.01%     
==========================================
  Files         162      163       +1     
  Lines        1848     1847       -1     
  Branches      243      242       -1     
==========================================
- Hits         1596     1595       -1     
  Misses        252      252

Impacted Files	Coverage Δ
packages/remax-cli/src/getConfig.ts	88.88% <ø> (ø)	⬆️
packages/remax-cli/src/build/rollupConfig.ts	83.75% <ø> (ø)	⬆️
packages/remax-cli/src/defaultOptions.ts	100% <ø> (ø)	⬆️
packages/remax-cli/src/getEntries.ts	70.45% <0%> (ø)	⬆️
packages/remax-cli/src/build/plugins/postcssUrl.ts	33.33% <0%> (ø)	⬆️
packages/remax-cli/src/build/plugins/removeSrc.ts	91.02% <100%> (-0.34%)	⬇️
packages/remax-cli/src/build/plugins/template.ts	87.8% <100%> (ø)	⬆️
packages/remax-cli/src/__tests__/build.ts	100% <100%> (ø)	⬆️
...c/__tests__/fixtures/root-dir/source/app.config.js	100% <100%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update bd8a38b...b54fccd. Read the comment docs.