Add light theme option for GUI

[IgorShadurin]

Feature Request: Light Theme for GUI

Description

The current GUI only offers a dark theme, which might not suit all users. This request is to implement a light theme, taking into account varying user preferences and eye sensitivities.

Reasons for Light Theme

User preferences, visual accessibility, and compatibility with different environments necessitate an alternative to the dark theme.

Proposed Solution

I suggest implementing an option within the settings to switch between dark and light themes, considering individual preferences. The selected theme should align with the system configuration, ensuring consistency across the user's device.