feat: add xerror pkg

[sysulq]

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[codecov-commenter]

Codecov Report

Merging #322 (ea3b41d) into master (98a84f0) will increase coverage by 1.35%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #322      +/-   ##
==========================================
+ Coverage   31.46%   32.81%   +1.35%     
==========================================
  Files          95       97       +2     
  Lines        6576     6713     +137     
==========================================
+ Hits         2069     2203     +134     
- Misses       4373     4377       +4     
+ Partials      134      133       -1     

Impacted Files	Coverage Δ
pkg/util/xerror/code_msg.go	100.00% <100.00%> (ø)
pkg/util/xerror/errors.go	100.00% <100.00%> (ø)
pkg/store/gorm/init.go	30.76% <0.00%> (-11.54%)	⬇️

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