[Feature] Add default filter type to settings

[lbird-mma]

✨ Feature Request for Booklore

Thank you for contributing to Booklore's development. Your suggestions help shape the future of this project.

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📝 Description

As requested in #1640 and implemented through #1671 there's now a single select filter type, which is great. As this is my default style of browsing, I would like it to be a setting.

🌟 Benefits

Setting single select as default filter type prevents switching every time

💻 Use Cases

1. For people who like the single select to be the default behaviour

📸 Visual References (Optional)

🎨 Technical Details (Optional)

📌 Additional Context