Python: Create an experimental class and function decorator.

[moonbox3]

Motivation and Context

There may be classes or functions inside of SK Python that should be deemed as experimental. Currently in Python there is no out-of-the-box way to get the decorator.

Description

As there is a name clash with using experimental as the decorator name, we are introducing two decorators: one experimental_class and one experimental_function. The note that "This {function | class} is experimental and may change in the future" is included in the docstring and a bool is_experimental on the class is added.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[markwallace-microsoft]

Python 3.10 Test Coverage Report •

File	Stmts	Miss	Cover	Missing
semantic_kernel/utils
experimental_decorator.py	16	1	94%	22
TOTAL	6158	1063	83%

Python 3.10 Unit Test Overview

Tests	Skipped	Failures	Errors	Time
1313	1 💤	0 ❌	0 🔥	15.450s ⏱️