Add Input Field for Custom Font Value Alongside Slider

[Mefisto04]

Describe the feature
Currently, the font size value is adjusted solely using a drag slider. This method may not provide the best user experience, as users might prefer a more precise way to set the font size rather than relying on a slider alone.

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To Reproduce
Steps to reproduce the behavior:

1. Go to the font adjustment section of the application.
2. Attempt to change the font size using the drag slider.
3. Notice the difficulty in achieving a specific font size without the ability to enter a precise value.

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Expected behavior
It would be beneficial to have an input field alongside the slider. This allows users to enter a custom font size directly, providing a more flexible and user-friendly experience for adjusting font values.

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Screenshots

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Additional context
Implementing an input field alongside the slider will enhance usability, allowing users to quickly and accurately set their desired font size without the limitations of the slider. This change could improve the overall user experience significantly.