Allow disabling color codes in the output

Summary

It would be nice to have an option to disable shell color codes and make the output of onefetch easier to parse. For example

[31;1mCommits: 411
[31;1mChurn (17): .travis.yml 6
[39m            …/workflows/build-test.yml 4

is problematic once you want to collect some stats across many repos.

Similar neofetch issue: https://github.com/dylanaraps/neofetch/issues/753

Motivation

I want to collect repo summaries across many projects.

ls -d * | xargs -I {} onefetch "{}" --no-bots --no-merges --number-of-authors 10 --number-of-file-churns 3 --no-art --no-color-palette --no-bold > summary.txt

produces a file which is difficult to parse without stripping the shell color codes first.