Add Get-PnPUserOneDriveLocation cmdlet

[gautamdsheth]

Summary

• Added Get-PnPUserOneDriveLocation using the existing SharePoint Online multi-geo REST client.
• Added the UserPersonalSiteLocation output model with UserPrincipalName, Location, MySiteUrl, and SiteId properties.
• Added cmdlet documentation and a Current nightly changelog entry.

Validation

• dotnet restore src\PnP.PowerShell.sln
• dotnet build src\PnP.PowerShell.sln --no-restore --verbosity minimal
• Imported the built debug module and verified Get-PnPUserOneDriveLocation syntax/metadata.

[Copilot]

Pull request overview

This PR adds a new tenant-admin cmdlet, Get-PnPUserOneDriveLocation, which returns SharePoint Online multi-geo location details (location code, OneDrive URL, site ID) for a user's OneDrive personal site. It reuses the existing internal MultiGeoRestApiClient and follows the established pattern of the sibling multi-geo admin cmdlets (base class, permission attributes, REST version negotiation, and case-insensitive deserialization).

Changes:

• Added a GetUserPersonalSiteLocation method to MultiGeoRestApiClient, targeting the UserPersonalSiteLocation('{upn}') REST path.
• Added the UserPersonalSiteLocation output model and the Get-PnPUserOneDriveLocation cmdlet, plus its documentation.
• Added a Current nightly → Added changelog entry.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/Commands/Utilities/MultiGeo/MultiGeoRestApiClient.cs	Adds the REST method and constants to fetch a user's personal site location; consistent with existing lookups.
src/Commands/Model/UserPersonalSiteLocation.cs	New output model with UserPrincipalName, Location, MySiteUrl, SiteId; matches sibling model conventions.
src/Commands/Admin/GetUserOneDriveLocation.cs	New cmdlet; missing [ValidateNotNullOrEmpty] on UserPrincipalName compared to sibling cmdlets.
documentation/Get-PnPUserOneDriveLocation.md	New cmdlet docs; structure and alphabetical parameter order are consistent.
CHANGELOG.md	Adds the nightly entry; missing the PR link used by all sibling entries.

[gautamdsheth]

Added the PR link to the Current nightly changelog entry.