Add: separated module readme example

[Raduc4]

Hi, I have tried to extract the sentiment analyzer into a separate function but the example from the docs didn't work, I have figured out how to deal with it and wanted to contribute to this project, maybe someone will encounter the same problem in the future.

[marimeireles]

Hey @Raduc4 glad you want to contribute this back!
I understand what you mean but I don't think it's clear enough on the README, could you add some extra strings explaining why someone would want to use your code?
Also, please make sure that your code is a minimal reproducible example, as in, the most generic possible and not your specific use case.
Once these changes are addressed I'm happy to merge it!
Thanks again!