[WIP] Update pyproject file for Django 6 support with Python 12

[Copilot]

• Update pyproject.toml to add Django 6 support with Python >= 3.12
• Update requires-python to ">=3.12" (removing Python 3.10, 3.11 support for Django 6)
• Update classifiers to include Django 6.0 and remove Python 3.10, 3.11
• Update Django dependency in dev group from 5.2.9 to support Django 6
• Update GitHub Actions workflow to test only Python >= 3.12
• Update deprecation warning filters in pytest config
• Run tests to verify changes

Original prompt

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This section details on the original issue you should resolve

<issue_title>Django 6 support</issue_title>
<issue_description>Django 6 is released and it is not supporting Python 10 and python 11.
We should update the pyproject file to support Django 6 with python >= 12</issue_description>

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

• Fixes Django 6 support #73

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