Docs: Document support for WLS in quickstart.ipynb

[s3alfisc]

Context

The quickstart section currently does not include an example for WLS with pyfixest.

To do

Add an example for WLS to the quickstart notebook.

[s3alfisc]

@prteek mentioned that he would take up this one =) though it seems I cannot assign you if you haven't interacted with this issue yourself.

[prteek]

Happy to take this up. @s3alfisc Also can hop on a call for introductions and understanding the codebase etc.

[s3alfisc]

Cool! Will assign this to you later today (after work) and will also send you a mail / reach out on LinkedIn about an intro to the code base =)

[prteek]

Thanks, having some issues with my LinkedIn please do reach out on [email protected] :)