Add Verifysdist and Verifywhl without Tox

[JennyPng]

Description

#42883

[scbedd]

Will handle these and get em across the finish line for you.

[Copilot]

Pull Request Overview

This PR adds new verification commands verifywhl and verifysdist to the Azure SDK tooling, providing an alternative to the existing tox-based workflow. The changes implement comprehensive package validation including wheel structure verification, source distribution checks, metadata compatibility validation, and type annotation configuration verification.

Key changes:

• Adds standalone wheel and source distribution verification tools
• Implements metadata compatibility checking against prior versions
• Validates proper py.typed configuration for type annotations

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
eng/tools/azure-sdk-tools/azpysdk/verify_whl.py	New module implementing wheel verification including root directory validation and metadata compatibility checks
eng/tools/azure-sdk-tools/azpysdk/verify_sdist.py	New module implementing source distribution verification including directory structure and py.typed configuration validation
eng/tools/azure-sdk-tools/azpysdk/main.py	Registers the new verification commands in the main CLI parser
doc/tool_usage_guide.md	Documents the new verifywhl and verifysdist commands with usage examples

[scbedd]

@JennyPng @swathipil is updating this check over in #43188 , you might want to hold off merging this to fold those changes in.

[scbedd]

Hold off on merging till Swathi's PR goes in. Then fold those changes in IMO, but I won't block this. If you want to just submit another PR updating after Swathi is done, good with that too!

The copilot comments strike me as right. It might be working as-is because we're in cwd context of the target folder by accident.