Improve the sample app to allow testing the customization attributes of the library

[krharsh17]

Try implementing the sample app similar to this:

(Taken from https://github.com/lopspower/CircularProgressBar)

[Samriddhi25]

I want to take this issue.

[krharsh17]

Okay. I'll assign it to you.

[krharsh17]

I just had a look at it. This is for PHASE 2, it will be assigned once PHASE 1 is complete. My apologies 🙇🏻

[krharsh17]

@Samriddhi25 Do you still want to work on this?

[Samriddhi25]

yes