fix: author display in cli

[elrrrrrrr]

Revert ineffective changes from https://github.com/cnpm/cnpmcore/pull/581, add username index

• 🧶 Add username field to maintainers in search results, handle uniformly when writing

• 📚 Update index documentation

  回滚 https://github.com/cnpm/cnpmcore/pull/581 无效改动，添加 username 索引

• 🧶 搜索结果中的 maintainers 添加 username 字段，写入时统一处理
• 📚 更新索引文档说明

[codecov[bot]]

Codecov Report

Merging #582 (1b5df8e) into master (6dd241d) will decrease coverage by 0.06%. Report is 1 commits behind head on master. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #582      +/-   ##
==========================================
- Coverage   96.99%   96.94%   -0.06%     
==========================================
  Files         180      180              
  Lines       17356    17356              
  Branches     2253     2254       +1     
==========================================
- Hits        16834    16825       -9     
- Misses        522      531       +9     

Files Changed	Coverage Δ
app/repository/SearchRepository.ts	100.00% <ø> (ø)
app/core/service/PackageSearchService.ts	93.83% <100.00%> (+0.08%)	:arrow_up:
app/repository/PackageRepository.ts	98.21% <100.00%> (+<0.01%)	:arrow_up:

... and 2 files with indirect coverage changes