feat: verify v2

[manchuck]

Adding in Verify v2

Description

This adds in the Verify V2 module

Motivation and Context

Testing Details

Example Output or Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[dragonmantank]

Verify v2 also supports basic header auth, so like with Messages we should support that (it's not a side effect of the auth changes, but a way for customers to still send Verify without setting up an application)