[Feature request] Incorporate helper functions from https://github.com/alexott/databricks-playground/tree/main/pyspark-snippets/pyspark_helpers

[alexott]

This repo has a number of useful helper functions that aren't in quinn yet.

[robertkossendey]

delta_helpers & data_skipping could be merged into mack

[SemyonSinchenko]

@alexott Unfortunately the databricks playground repository has not any kind of LICENSE, so we cannot just take functions from it. If you are an author of all the code in this repository there are two ways:

1. You can create PR to quinn library with new functions
2. You can add a LICENSE to the databricks playground repository. In such a case Apache 2.0 is preferrable because both PySpark and quinn itself are distributed under Apache 2.0