Adding docs for license configuration

[jbogard]

Fixes #4580, #4579, #4566

[Copilot]

Pull Request Overview

This PR adds documentation for AutoMapper license configuration to address issues #4580, #4579, and #4566. It provides comprehensive guidance on how to configure commercial licenses and handle different deployment scenarios.

• Adds complete license configuration documentation covering both MS.Ext.DI and direct usage scenarios
• Documents license enforcement mechanism and logging behavior
• Provides guidance for client redistribution scenarios where license keys should not be exposed

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
docs/source/index.rst	Adds reference to new License-configuration document in the table of contents
docs/source/License-configuration.md	New documentation file explaining license configuration, enforcement, and client redistribution scenarios

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