[Package Request]: Microsoft SharePoint Migration Tool

### How can we help?

I would like someone else to build the manifest.

### Please read and ensure the following

- [x] The installer meets the above requirements

### Please provide the following information

Download Page Url: https://learn.microsoft.com/en-us/sharepointmigration/how-to-use-the-sharepoint-migration-tool
Publisher: Microsoft
Package Name: Microsoft.SharePointMigrationTool
Description: The SharePoint Migration Tool (SPMT) is a free and easy to use migration solution to help you migrate content from on-premises SharePoint sites to Microsoft 365.
Package Version: 1.0.0
Installer Url: https://aka.ms/spmt-ga-page

While advertised as a migration tool it is generally useful as a large batch upload tool. The application is self updating in case that matters.

Start with the supplied SharePoint Migration Tool download page and installer URL, and review the package manifest requirements for Microsoft.SharePointMigrationTool. Create the manifest from the provided publisher, version, description, and installer details, accounting for the application's self-updating behavior. Done means the manifest passes repository validation and accurately installs the requested tool.

Written by the indexing model from the issue text.