docs(BUX-442): updates readme and code standards

[jakubmkowalski]

Pull Request Checklist

• 📖 I created my PR using provided : CODE_STANDARDS
• 📖 I have read the short Code of Conduct: CODE_OF_CONDUCT
• 🏠 I tested my changes locally.
• ✅ I have provided tests for my changes.
• 📝 I have used conventional commits.
• 📗 I have updated any related documentation.
• 💾 PR was issued based on the Github or Jira issue.

New version of README, restyled and updated CODE_STANDARDS

[mergify]

Welcome to our open-source project @jakubmkowalski! 💘

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e144bc2) 53.28% compared to head (0100e90) 53.28%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #542   +/-   ##
=======================================
  Coverage   53.28%   53.28%           
=======================================
  Files         110      110           
  Lines       10854    10854           
=======================================
  Hits         5784     5784           
  Misses       4605     4605           
  Partials      465      465           

Flag	Coverage Δ
unittests	53.28% <ø> (ø)

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