Add the option for a short report

[goar5670]

Description

Thanks for contributing this Pull Request. Add a brief description of what this Pull Request does. Do tag the relevant issue(s) and PR(s) below. If required, add some screenshot(s) to support your changes.

• Relevant Issues : (Can "--report" show a summary much more simple? #381)
• Relevant PRs : (none)
• Type of change :
  • New feature
  • Bug fix for existing feature
  • Code quality improvement
  • Addition or Improvement of tests
  • Addition or Improvement of documentation

[codecov-commenter]

Codecov Report

Merging #502 (e9166e8) into master (234815d) will increase coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #502      +/-   ##
==========================================
+ Coverage   89.18%   89.26%   +0.07%     
==========================================
  Files           8        8              
  Lines         555      559       +4     
==========================================
+ Hits          495      499       +4     
  Misses         60       60              

Impacted Files	Coverage Δ
lib/colorls/core.rb	90.08% <100.00%> (+0.08%)	⬆️
lib/colorls/flags.rb	88.23% <100.00%> (+0.15%)	⬆️

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[avdv]

💯

[avdv]

Thank you @goar5670 !