add <ctrl-c> mapping for killing the running test

[radlinskii]

currently to exit the app we need to first pause the test with and then press 'q' to exit the app, we could add a mapping to quit the app directly, from any mode and screen.

It should be documented in both code and readme.

[bansalmohit123]

hey @radlinskii
Could you please assign me this task , I want to work on it
Thanks!

[Commit2Cosmos]

Hi @bansalmohit123, are you still working on it?