🔧 Maintenance round

[denialhaag]

Description

This PR makes several maintenance updates:

• Fix required-checks-pass job
• Use client-id instead of app-id
• Update to new MQSC branding
• Improve support for CLAUDE.md
• Configure Read the Docs to use Python 3.14 for colorful docs
• Configure Read the Docs to natively use uv

Checklist

• The pull request only contains commits that are focused and relevant to this change.
• I have added appropriate tests that cover the new/changed functionality.
• I have updated the documentation to reflect these changes.
• I have added entries to the changelog for any noteworthy additions, changes, fixes, or removals.
• I have added migration instructions to the upgrade guide (if needed).
• The changes follow the project's style guidelines and introduce no new warnings.
• The changes are fully tested and pass the CI checks.
• I have reviewed my own code changes.

[denialhaag]

Here, I'm even confused by two things:

1. Why is check-sdist suddenly failing?
2. Why are the tests on main suddenly failing now? Why haven't they failed before? matplotlib is not among the dependencies of MQT Predictor, so it makes a lot of sense that 5a8b040 was necessary.

Any ideas, @burgholzer?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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