docs: prefer go test to use of godog cli in README

[danielhelfand]

Closes #537

This pull request updates documentation to prefer go test over the godog CLI in the main README example. I realize there has been some discussion around deprecating the CLI since last checking on this, so please let me know if the deprecation information I was working off of from #478 is still accurate.

🤔 What's changed?

Remove godog CLI related details from main README example. Add notice of CLI deprecation to docs.

⚡️ What's your motivation?

If the CLI is to be deprecated or have less maintenance around it, adopters of godog should be pointed to up to date information when considering the project.

🏷️ What kind of change is this?

• 🏦 Refactoring/debt/DX (improvement to code design, tooling, documentation etc. without changing behaviour)

♻️ Anything particular you want feedback on?

📋 Checklist:

• I agree to respect and uphold the Cucumber Community Code of Conduct
• I've changed the behaviour of the code
  • I have added/updated tests to cover my changes.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• Users should know about my change
  • I have added an entry to the "Unreleased" section of the CHANGELOG, linking to this pull request.

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[codecov]

Codecov Report

Merging #548 (684f65c) into main (17f07d2) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #548   +/-   ##
=======================================
  Coverage   82.24%   82.24%           
=======================================
  Files          27       27           
  Lines        3340     3340           
=======================================
  Hits         2747     2747           
  Misses        484      484           
  Partials      109      109           

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[vearutop]

Yes, deprecation info is still accurate, thank you for updating the docs! 👍

[aslakhellesoy]

Hi @danielhelfand,

Thanks for your making your first contribution to Cucumber, and welcome to the Cucumber committers team! You can now push directly to this repo and all other repos under the cucumber organization! 🍾

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