Add support to point to SQL sources

[jcorrado76]

Adding some basic support for the major SQL engines would be nice:

• Postgres
• MySQL
• Snowflake
• Bigquery
• Redshift

[danielbeach]

@jcorrado76 Sure, I wonder can Polars directly read those rdbms with some minimal config? I'm using polars to do all the heavy lifting so far.

[jcorrado76]

For whoever winds up taking this on:
https://pola-rs.github.io/polars/py-polars/html/reference/api/polars.read_database.html

[lordirah]

@danielbeach - Can I pick this up ?

[danielbeach]

@lordirah all yours!