Add configurability for the list of ignored owners

[majakurcius]

Description

Changes proposed in this pull request:

• Add configurability for the list of ignored owners
• Update README, and fix its structure
• Fix typos

Related issue(s)

Fixes #54

[codecov[bot]]

Codecov Report

Merging #55 into master will increase coverage by 4.31%. The diff coverage is 82.35%.

@@            Coverage Diff             @@
##           master      #55      +/-   ##
==========================================
+ Coverage   45.82%   50.13%   +4.31%     
==========================================
  Files          13       12       -1     
  Lines         371      375       +4     
==========================================
+ Hits          170      188      +18     
+ Misses        199      183      -16     
- Partials        2        4       +2     

Impacted Files	Coverage Δ
internal/check/valid_owner.go	29.82% <82.35%> (+19.04%)	:arrow_up:
internal/check/valid_owner_error.go	50.00% <0.00%> (+50.00%)	:arrow_up:

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[mszostok]

As discussed f2f, the integration tests are not working on forked PRs (yet 🙏 ). This will be documented in a separate PR :)

merging 🚀