add sandbox.create_file() method

[pushpitkamboj]

Is your feature request related to a problem?

I wanted to create a python file, it would have been better if sandbox.create_file() would have existed for better DX, the way create folder method exist

Describe the solution you'd like

create a method named create_file()

Describe alternatives you've considered

don't add this method, do things manually by shell commands

Additional context

none

Thank you for the feature request!