README: Add KubeAI under integrations

[samos123]

License

By submitting this PR, I confirm that my contribution is made under the terms of the MIT license.

[greptile-apps]

PR Summary

Added KubeAI to the integrations section of the README, expanding the project's ecosystem to include Kubernetes-based AI inferencing capabilities.

• Added [KubeAI: Kubernetes AI Operator for inferencing](https://github.com/substratusai/kubeai) to integrations list in README.md

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[michaelfeil]

Thanks!

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.18%. Comparing base (c9a8404) to head (71617e9).
Report is 1 commits behind head on main.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #453   +/-   ##
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  Coverage   79.18%   79.18%           
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  Files          41       41           
  Lines        3248     3248           
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  Hits         2572     2572           
  Misses        676      676           

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