Add poppler_path Argument to zerox Function

[brightertiger]

Description:
The convert_from_path function in the pdf2image library currently supports a poppler_path argument, which allows users to specify the path to the Poppler binaries.

This feature is particularly useful for environments where installing Poppler system-wide (e.g., on Windows without administrative rights) is challenging.

Request:
Please add support for the poppler_path argument in the zerox function to provide similar flexibility for specifying the Poppler binaries path.

Reason:

• Simplifies the use of zerox in restricted environments, such as Windows without admin rights.
• Aligns functionality between convert_from_path and zerox, improving consistency within the library.

Thank you for considering this enhancement!

[brightertiger]

created a Pull Request implementing the same. Please review.

#127