Add a button to change color themes

[androemeda]

background color should change on clicking the button.

[abhishekshah5486]

@priyasirohi09 assign this issue to me.

[arjun-kshirsagar]

@priyasirohi09 Please assign it to me

[Yash020405]

I want to resolve the issue

[siddham-jain]

@priyasirohi09 i want to add a button please assign it to me

[OmMishra16]

With all sincerity and dedication, I want to work on this issue. Please assign this issue to me @priyasirohi09

[ruthwikchikoti]

i want to resolve this issue @priyasirohi09