chore: support Python 3.14

[nsano-rururu]

Fixes

A short description of what this PR does.

Checklist

• I acknowledge that all my contributions will be made under the project's license
• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the Contribution Guidelines and my PR follows them
• I have titled the PR appropriately
• I have updated my branch with the main branch
• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation about the functionality in the appropriate .md file
• I have added inline documentation to the code I modified

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[Copilot]

Pull Request Overview

This PR adds support for Python 3.14 to the project by updating configuration files and documentation to include the new Python version in testing and compatibility matrices.

• Added Python 3.14 to tox environments for local testing
• Updated setup.py classifiers to declare Python 3.14 compatibility
• Modified CI workflow to test against Python 3.14

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
tox.ini	Added Python 3.14 to the list of test environments
setup.py	Added Python 3.14 classifier to package metadata
README.md	Added Python 3.14 to the list of supported implementations
.github/workflows/test-and-deploy.yml	Added Python 3.14 to the CI test matrix

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