Add task audit endpoints to SDK

[fatihkurtoglu]

Pull Request Summary

• Implementing existing task accept/reject API for audits to SDK
• client.audit_task() as well as task.audit() are implemented methods
• Readme is updated with examples

TODO: Testing of audit endpoint via test task/project is not available so that part is to-be implemented later.

Description

Implementing already existing audit API endpoint into the SDK.
https://docs.scale.com/reference/audit-a-task

How did you test your code?

Which of the following have you done to test your changes? Please describe the tests that you ran to verify your changes.

• Created new unit tests in tests/ for the newly implemented methods
• Updated existing unit tests in tests/ to cover changes made to existing methods

Checklist

Please make sure all items in this checklist have been fulfilled before sending your PR out for review!

• I have commented my code in details, particularly in hard-to-understand areas
• I have updated Readme.rst document with examples for newly implemented public methods
• I have reviewed Deployment and Publishing Guide for Python SDK document
• I incremented the SDK version in _version.py (unless this PR only updates the documentation).
• In order to release a new version, a "Release Summary" needs to be prepared and published after the merge

[fatihkurtoglu]

@jonathanfeng-scale FYI, Used the same next version with your PR #63 so we can update according to whoever merges earlier.

[jonathanfeng-scale]

LGTM

This can the the v2.11

Studio can be v2.12