Move mutation state to mutation objects

[dominik-zeglen]

I want to merge this change because it resolves #30

Pull Request Checklist

1. All visible strings are translated with proper context.
2. All data-formatting is locale-aware (dates, numbers, and so on).
3. Translated strings are extracted to .pot file.
4. Number of API calls is optimized.
5. The changes are tested.
6. Type definitions are up to date.
7. Changes are mentioned in the changelog.

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[codecov]

Codecov Report

Merging #297 into master will decrease coverage by 0.01%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #297      +/-   ##
==========================================
- Coverage   74.36%   74.35%   -0.02%     
==========================================
  Files         607      607              
  Lines        6651     6652       +1     
  Branches     1073     1074       +1     
==========================================
  Hits         4946     4946              
- Misses       1518     1519       +1     
  Partials      187      187

Impacted Files	Coverage Δ
src/mutations.tsx	8.33% <0%> (ø)	⬆️
src/plugins/views/PluginsDetails.tsx	17.07% <0%> (+0.79%)	⬆️
src/misc.ts	52.74% <0%> (-1.8%)	⬇️

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[tomaszszymanski129]

Would be good to split such enormous work to smaller PRs in future, so it would be possible to actually review the thing 😅

[dominik-zeglen]

@tomaszszymanski129 this is mostly copypaste 🤷‍♂️