maintidx Support

[yagipy]

Your feature request related to a problem? Please describe.

I would like to measure the maintainability index.

Describe the solution you'd like.

Add support for maintidx.

Describe alternatives you've considered.

Run maintidx separately to golangci-lint.

Additional context.

I will be responsible for implementing it myself.

[boring-cyborg]

Hey, thank you for opening your first Issue ! 🙂 If you would like to contribute we have a guide for contributors.

[butuzov]

How this information can be useful? We already have complexity checks in place, which is simpler abstraction of "code complexity" then one from microsoft.

[yagipy]

@butuzov
Thanks for your opinion.

How this information can be useful?

IMO, "code complexity" is difficult to decide based on a single indicator and should be decided by referring to multiple indicators.
I recognize that there is already support for indicators such as cyclomatic complexity, cognitive complexity, etc., and I think no problem in having a maintainability index among them.