No support for Dark Theme

[thunder-coding]

This application does not have any support for dark theme.

[vkassingh]

Dark theme feature can be added by Replacing the parent theme’s color attribute with the DayNight variant of the same. then specify the colours for the dark mode and provide a toggle button to the users to swtich to dark mode

any java developer can do it with ease. solved issue #512

[prakharb5]

Please implement this feature.

[shivamparashar165]

Please assign me this issue

[thunder-coding]

There have been 11 months since last commit on this repository, I feel it's no longer being maintained @shivamparashar165