Add lint rule for comments ( index, constraint, trigger )

[k1LoW]

No description provided.

[codecov]

Codecov Report

Merging #221 into master will decrease coverage by 0.27%.
The diff coverage is 97.43%.

@@            Coverage Diff             @@
##           master     #221      +/-   ##
==========================================
- Coverage   68.59%   68.32%   -0.28%     
==========================================
  Files          20       20              
  Lines        3436     3514      +78     
==========================================
+ Hits         2357     2401      +44     
- Misses        847      885      +38     
+ Partials      232      228       -4     

Impacted Files	Coverage Δ
config/lint.go	95.73% <97.43%> (+0.53%)	⬆️
datasource/datasource.go	21.45% <0.00%> (-13.74%)	⬇️

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