refactor: split collection manager from user repo

[trim21]

No description provided.

[codecov]

Codecov Report

Merging #185 (84a1cef) into master (3796a40) will increase coverage by 0.73%.
The diff coverage is 51.30%.

@@            Coverage Diff             @@
##           master     #185      +/-   ##
==========================================
+ Coverage   46.53%   47.27%   +0.73%     
==========================================
  Files          95       96       +1     
  Lines        5546     5544       -2     
==========================================
+ Hits         2581     2621      +40     
+ Misses       2702     2653      -49     
- Partials      263      270       +7     

Impacted Files	Coverage Δ
internal/model/subject_type.go	0.00% <0.00%> (ø)
internal/user/mysql_repository.go	42.85% <ø> (+14.40%)	⬆️
internal/web/handler/query_parse.go	29.33% <0.00%> (-6.16%)	⬇️
internal/web/res/user.go	89.47% <ø> (ø)
main.go	0.00% <ø> (ø)
internal/web/handler/collection.go	29.29% <35.71%> (+6.97%)	⬆️
internal/collection/mysql_repo.go	64.55% <64.55%> (ø)
internal/test/web.go	91.01% <100.00%> (+0.05%)	⬆️
internal/web/handler/new.go	75.40% <100.00%> (+0.40%)	⬆️

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