This pull request updates the supported Python, Django, and Wagtail versions across the project to drop older versions and add support for newer ones, including Python 3.14 and Wagtail 7.2.

Supported version updates:

• Updated the supported Python versions to remove 3.9 and add 3.14, and adjusted the minimum required Python version to 3.10
• Updated supported Django versions to remove 5.0
• Updated supported Wagtail versions to remove 6.4 and 7.1, and add 7.2

Test and build matrix updates:

• Updated the GitHub Actions workflow in .github/workflows/test.yml to test against the new supported Python versions, including Python 3.14.

Documentation updates:

• Revised the supported versions section in README.md to accurately reflect the new compatibility matrix.

AI Code Changes
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