Provide machine-parseable version output

[porridge]

Is your feature request related to a problem? Please describe.

Automatically checking the available tool version is hacky and fragile, as seen in the examples below. This is because the output of golangci-lint --version is mean for human rather than machine consumption.

Describe the solution you'd like

Something easy to parse in a shell script. The piece that would make us happy would be:

$ golangci-lint --version-string
v1.777.0

If other pieces are also needed, one could also imagine:

$ golangci-lint --version-mod-sum
h1:HxAxpR8Z0M8omihvQdsD3PF0qPjlqYqp2vMJzstoKeI=

Describe alternatives you've considered

One could also imagine --version --json that would produce structured output, but that is not so easy to use in a shell script without additional tools (jq).

The output for --version could be changed without introducing another flag, but that would break backwards compatibility.

Additional context

Some projects try to ensure that the version of golangci-lint they use is consistent for all developers (example, another).

[boring-cyborg]

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