Add 3.14 support

[paddyroddy]

https://docs.python.org/3.14/whatsnew/3.14.html

[Copilot]

Pull Request Overview

This PR adds support for Python 3.14 by updating configuration files and CI workflows to include the new Python version alongside existing versions.

• Added Python 3.14 classifier and testing environment to pyproject.toml
• Updated GitHub Actions workflows to test against Python 3.14
• Changed default Python version from 3.13 to 3.14 in several workflows

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pyproject.toml	Added Python 3.14 classifier and tox environment configuration
.github/workflows/test.yaml	Added Python 3.14 to test matrix and required jobs list
.github/workflows/examples.yaml	Updated default Python version from 3.13 to 3.14
.github/workflows/documentation.yaml	Updated default Python version from 3.13 to 3.14
.github/workflows/deploy.yaml	Updated default Python version from 3.13 to 3.14

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