[Feature]: Configurable Dark Mode Themes with Dynamic Theme Setting

[GourabMCFC]

Description

Currently, when the "Dynamic Theme" option is selected and the user's device enters dark mode, the application switches to a single predefined dark background. This offers limited flexibility for users who have a preference for different shades or styles of dark backgrounds. It would be a great enhancement to allow users to choose from multiple predefined dark background options to better suit their preferences.

Adding the ability for users to choose their preferred dark mode background theme from a list of predefined options. This would allow users to personalize their experience.

Benefits:
Enhanced User Experience: Users gain more control over the look and feel of RiMusic in dark mode, leading to a more personalized experience.
Improved Battery Life (AMOLED Screens): A "Pure Black" theme ,already available as a standalone option, could be offered to maximize battery savings on devices with AMOLED screens.

Desired Result

Suggested Solution

1. Add a new setting section under "User Interface" to manage the dark mode background theme preference.
2. Create a dropdown menu or similar interface element that lists available theme options such as (Pure Black/Modern Black)
3. Store the user's selection and seamlessly apply it whenever they are in dark mode with the "Dynamic Theme" setting enabled.

Alternatives

No response

Additional Context

No response

[fast4x]

Implemented, available from version 0.6.25

[GourabMCFC]

Implemented, available from version 0.6.25

Thank You !!!!