fix: Switch to pyspark package as a dependency

[medb]

Fixes compatibility with Colab environment that already has pre-installed pyspark package

[gemini-code-assist]

Summary of Changes

Hello @medb, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request aims to enhance the project's compatibility, particularly for users working in Google Colab. By switching the PySpark dependency from a client-only package to the full pyspark package with the connect extra, the project ensures a more robust and functional Spark environment, resolving previous issues encountered in interactive notebook settings.

Highlights

• Dependency Update: The pyspark-client dependency has been replaced with pyspark[connect] in both development and production dependency lists.
• Colab Compatibility: This change specifically addresses and fixes compatibility issues when running the project within a Google Colaboratory (Colab) environment.

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[gemini-code-assist]

Code Review

This pull request correctly updates the project's dependencies by replacing the deprecated pyspark-client package with pyspark[connect]. This change aligns with the recommendations for PySpark 4.0+ and, as noted in the description, resolves compatibility issues with environments like Google Colab. The modifications in requirements-dev.txt and setup.py are consistent and appropriate. The change is approved as is.