Feat/add mergerequest api

[hunjixin]

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[codecov]

Codecov Report

Attention: 199 lines in your changes are missing coverage. Please review.

Comparison is base (c94b8e9) 63.08% compared to head (3632e63) 64.27%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #99      +/-   ##
==========================================
+ Coverage   63.08%   64.27%   +1.18%     
==========================================
  Files         102      104       +2     
  Lines       10647    11379     +732     
==========================================
+ Hits         6717     7314     +597     
- Misses       3245     3346     +101     
- Partials      685      719      +34     

Files	Coverage Δ
controller/commit_ctl.go	67.03% <100.00%> (ø)
controller/object_ctl.go	61.61% <100.00%> (ø)
models/branch.go	92.43% <100.00%> (+0.26%)	⬆️
models/repo.go	78.12% <100.00%> (+1.45%)	⬆️
models/tree.go	78.20% <100.00%> (+1.28%)	⬆️
models/user.go	95.23% <100.00%> (+10.75%)	⬆️
models/wip.go	91.30% <100.00%> (+5.82%)	⬆️
testhelper/pg.go	100.00% <100.00%> (ø)
utils/convert_types.go	82.54% <100.00%> (+0.16%)	⬆️
utils/hash/hash.go	76.47% <100.00%> (+5.88%)	⬆️
... and 7 more