Minimal permissions for 'spo web' 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 web add
• m365 spo web get
• m365 spo web list
• m365 spo web reindex
• m365 spo web remove
• m365 spo web set

Start with the documentation pages for the six listed spo web commands and read the linked guidance on documenting minimal permissions. Check each command's actual permission requirements, then add a Permissions section before Examples, ordering multiple resources alphabetically and documenting delegated or application-only support where applicable. Done means all six pages consistently show only the minimal required permissions.