(#73) Moved grpc/grpc dependency

[s1lver]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌
Fixed issues	#73

[what-the-diff]

PR Summary

• Ignoring PHPUnit cache files
  The team included PHPUnit's result cache files in the .gitignore file. This prevents redundant files from being tracked in the git repository, keeping it clean and efficient.

• Dependency Modification
  The grpc/grpc software package has been moved from the project's main dependencies to its development dependencies in the composer.json file. This optimizes the packages that our software requires to run properly, ensuring that unnecessary packages are not installed in a production environment.

• Documentation update
  A crucial instruction - how to manually add the grpc/grpc package - has been added to the grpc-application-runner.md. This provides clearer guidelines for developers and significantly helps in setting up the development environment.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (29b1765) 100.00% compared to head (c9ed550) 100.00%.

❗ Current head c9ed550 differs from pull request most recent head 869a300. Consider uploading reports for the commit 869a300 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##              master       #76   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity        27        27           
===========================================
  Files              3         3           
  Lines            125       125           
===========================================
  Hits             125       125           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[samdark]

Need a line for CHANGELOG.