[Feature Request] Add sepia theme for eye comfort

[meenbeese]

Checklist

• [X] This issue contains only one feature request. I will open one issue for every feature I want to request.
• [X] I checked, but didn't find any duplicates (open OR closed) of this issue in the repo.
• [X] This feature is merely an UI/UX update.
• [X] This feature is not going to conflict with many of the existing features/options.

Is your feature request related to a problem? Please describe.

Reading digital content often causes eye strain, especially during low-light conditions. The app lacks a sepia theme option, which is known to reduce eye strain while maintaining readability.

Describe the solution you'd like

Requesting a sepia theme for the app. Sepia tones offer a soothing reading experience, imitating aged paper and providing a comfortable contrast between text and background.

How will you/everyone benefit from this feature?

Users who read extensively, especially at night, will benefit from reduced eye strain. The sepia theme offers a visually appealing and comfortable reading experience, aligning with current trends for eye-friendly interfaces.

Additional context

Research supports sepia themes for minimizing blue light's negative effects on sleep patterns. Adding this feature could enhance user satisfaction, attract more users, and increase app usage.

[starry-shivam]

I already had plans to add this somewhere in future, will try in upcoming releases if i get enough time.