fix: should search default packages when text is empty

[Beace]

当搜索关键词为空时，不进行 ES 关键词搜索拼接，返回一个默认的全量数据排名。 close #622

[codecov]

Codecov Report

Attention: 167 lines in your changes are missing coverage. Please review.

Comparison is base (6624a36) 97.45% compared to head (244c06a) 96.83%.
Report is 145 commits behind head on master.

Files	Patch %	Lines
config/config.default.ts	53.03%	31 Missing ⚠️
.../port/controller/admin/PaddingVersionController.ts	48.83%	22 Missing ⚠️
app/core/service/FixNoPaddingVersionService.ts	54.54%	15 Missing ⚠️
app/core/service/PackageSearchService.ts	93.72%	15 Missing ⚠️
app/core/service/PackageSyncerService.ts	85.84%	15 Missing ⚠️
app/port/schedule/SyncBinaryWorker.ts	21.42%	11 Missing ⚠️
app/repository/PackageVersionRepository.ts	87.95%	10 Missing ⚠️
app/core/service/PackageVersionFileService.ts	91.48%	8 Missing ⚠️
app/core/entity/PaddingSemVer.ts	88.00%	6 Missing ⚠️
app/core/service/PackageVersionService.ts	94.91%	6 Missing ⚠️
... and 11 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #623      +/-   ##
==========================================
- Coverage   97.45%   96.83%   -0.62%     
==========================================
  Files         168      180      +12     
  Lines       15691    17551    +1860     
  Branches     2018     2285     +267     
==========================================
+ Hits        15291    16996    +1705     
- Misses        400      555     +155     

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