Update UI

[YojanProductions]

Update the UI so it looks better.

Suggestions:

1. Bigger text (decently sized)
2. Keep the black and white color scheme it looks very good

[ApplicationCoding]

I will still figure out how to make the text bigger, so I may finish this issue for v1.6.1

[ApplicationCoding]

I think this is not easy to code in C#. I'll still figure out a way to make this feature possible. Hopefully, in upcoming Console Calculator versions, include this feature.