Minimal permissions for 'spo user' commands

We're adding a new Permissions section to all commands. This section will document the minimal delegated and application permissions required to execute the command.

The goal is to:

• Make it easier to run the CLI with custom app registrations and application permissions.
• Ensure we only document the minimal set of permissions needed.
• Keep documentation consistent by placing the Permissions section right before the Examples section.
• If there are multiple resources, order them alphabetically
• If there are commands that only support one type of auth (like delegated or app-only), we have an example for that as well. E.g. m365 planner tenant settings list - Permissions

Resources

• Writing the docs page
• How to document minimal permissions
• Planner example 1
• Planner example 2

Commands in scope

This issue covers the following commands:

• m365 spo user ensure
• m365 spo user get
• m365 spo user list
• m365 spo user remove

Start with the four command documentation pages for m365 spo user ensure, get, list, and remove, using the linked writing and minimal-permissions guides first. Add a Permissions section immediately before Examples on each page, documenting minimal delegated and application permissions, with multiple resources alphabetized; done when all four pages follow the linked examples and guidance.