Add Python 3.14 to CI/CD workflow build matrices

[Copilot]

Extends CI/CD pipeline to build and test wheels for Python 3.14 across all platforms.

• Added python: 314 matrix entries for all 4 platforms (Windows win_amd64, Linux manylinux_x86_64, macOS x86_64, macOS arm64) in:
  • main.yml (CI)
  • release.yml (PyPI publish)
  • pre-release.yml (pre-release publish)
  • test-release.yml (TestPyPI publish)
• Added CHANGELOG.md entry in the Unreleased > Added section documenting Python 3.14 support.

The pyproject.toml classifier for Python 3.14 was already present.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add support for Python 3.14</issue_title>
<issue_description></issue_description>

<agent_instructions>Add support for Python 3.14 particularly by updating the github action workflows to include testing for Python 3.14 as well. </agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Add support for Python 3.14 #284

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[TheGupta2012]

@copilot add a changelog entry for this change in the unreleased section

[Copilot]

@copilot add a changelog entry for this change in the unreleased section

Added the changelog entry in the Unreleased > Added section in commit 6a321e2.