docs: add installation and usage guide for cz-ai plugin leveraging GP…

[watadarkstar]

Description

Add documentation for a new cz-ai commitizen plugin, including installation and usage instructions. This plugin leverages OpenAI’s GPT-4o to generate conventional commit messages automatically from staged git changes.

Closes #670

Checklist

• I have read the contributing guidelines

Documentation Changes

• Run poetry doc locally to ensure the documentation pages renders correctly

Expected Behavior

The documentation should clearly explain how to install and use the cz-ai plugin to generate conventional commit messages automatically.

Steps to Test This Pull Request

1. Build the documentation locally (e.g., run poetry doc)
2. Verify the new section for cz-ai appears correctly with installation and usage commands
3. Optionally, install the plugin and try the usage command to confirm instructions are accurate

Additional Context

This addition introduces a new tool to improve commit message quality and consistency by leveraging AI, which could significantly streamline developer workflows.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.62%. Comparing base (120d514) to head (87a48a4).
Report is 627 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1458      +/-   ##
==========================================
+ Coverage   97.33%   97.62%   +0.28%     
==========================================
  Files          42       57      +15     
  Lines        2104     2653     +549     
==========================================
+ Hits         2048     2590     +542     
- Misses         56       63       +7     

Flag	Coverage Δ
unittests	97.62% <ø> (+0.28%)	⬆️

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[Lee-W]

@watadarkstar Thanks! Looks good to me. Loop @bearomorphism in as I guess you might been interested in it?

[watadarkstar]

Thanks @Lee-W ! If you or @bearomorphism have any feedback feel free to DM me on X https://x.com/icookandcode

[bearomorphism]

Thanks @Lee-W ! If you or @bearomorphism have any feedback feel free to DM me on X https://x.com/icookandcode

Thanks! My X account has been broken recently though.

[watadarkstar]

Thanks @Lee-W ! If you or @bearomorphism have any feedback feel free to DM me on X https://x.com/icookandcode

Thanks! My X account has been broken recently though.

No worries I'm also on Linkedin, Discord, etc. Just let me know what platform works for you and I can send you my details.

[bearomorphism]

Oh my x account is back