DOC: update screenshots for enhanced feature showcasing

### What's wrong with the existing documentation

## Description

Upon inspection of the project documentation, I found that there are features such as the **_Github Workflow_** section in the sidebar menu that are nowhere to be found in the screenshots. An additional feature that is not showcased is the beautiful dark mode feature, a lot of people (me included) do prefer dark mode over light mode however users can't see that in the documentation, not even in a single screenshot. Check the screenshot below showcasing both missing features.

I will follow up on this issue with a PR, please add gssoc and hacktober-accepted labelt to the PR itself later on.

### Add ScreenShots


### Record

- [X] I agree to follow this project's Code of Conduct
- [X] I'm a GSSOC'24 contributor
- [X] I want to work on this issue