Remove python 3.7

[GoogolGenius]

Summary by Sourcery

Remove support for Python 3.7 from the project, including updates to the CI workflow and documentation to reflect the new minimum supported Python version of 3.8.

CI:

• Remove Python 3.7 from the GitHub Actions lint workflow matrix.

Documentation:

• Update README and documentation to reflect compatibility with Python 3.8+ instead of Python 3.7+.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request removes support for Python 3.7 from the project. The changes include updating the GitHub Actions workflow to exclude Python 3.7 from the testing matrix and setting the default Python version to 3.12. Additionally, the documentation has been updated to reflect that the project is now compatible with Python 3.8+.

File-Level Changes

Files	Changes
README.md docs/index.md	Updated documentation to reflect the removal of support for Python 3.7, indicating compatibility with Python 3.8+.

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[sourcery-ai]

Hey @GoogolGenius - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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