feat(rultor): direct script

[h1alexbel]

• feat(rultor): direct script

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PR-Codex overview

This PR focuses on adding npm installation and openapi-generator-cli usage in the merge script.

Detailed summary

• Added npm --version
• Added installation of @openapitools/openapi-generator-cli
• Added generation of Rust code using openapi-generator-cli

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.82%. Comparing base (932972e) to head (da49320).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #65   +/-   ##
=======================================
  Coverage   58.82%   58.82%           
=======================================
  Files           5        5           
  Lines          17       17           
=======================================
  Hits           10       10           
  Misses          7        7           

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