Dark + light theme button

[AkshitBhandariCodes]

i can help you create a whole dark + light themed site button that can make user interactions great.
assign the issue to me please
@anugit24

[SushritaSingh]

hey I can do this please assign this issue to me
@anugit24

[AkshitBhandariCodes]

@anugit24 check pr #15