Issue 2: Add Polynomial Features Support Description:

[prasanna-muppidwar]

Expand the linear regression model to support polynomial regression by transforming input features into polynomial features.

Key Features:

Implement a Polynomial Features class to generate polynomial combinations.
Add support in the linear regression class to toggle polynomial regression.
Where to add:
Add a new class PolynomialFeatures in algokit/preprocessing.py or algokit/feature_engineering.py.