API : The `wu/v2` does not appear to support pagination or filtering via query parameters.

[vuckro]

The wu/v2 API does not appear to support pagination or filtering via query parameters.

When using Bricks Builder (Query Loop type API) on the /wu/v2/site endpoint, standard parameters (page, per_page, number) are not taken into account — the response always returns all items regardless of pagination.

Additionally, the documentation lists endpoints in the plural form while the actual routes use the singular:

• Docs: /wu/v2/sites, /wu/v2/customers, /wu/v2/memberships…
• Actual: /wu/v2/site, /wu/v2/customer, /wu/v2/membership…

Ref: https://ultimatemultisite.com/docs/ro/developer/rest-api/overview/

To Reproduce

1. Call GET /wp-json/wu/v2/site?page=1&per_page=5
2. The response returns all sites with no limit applied
3. X-WP-Total and X-WP-TotalPages headers are missing or incorrect

Expected behavior

• Support for page and per_page (or number) parameters to paginate results
• X-WP-Total and X-WP-TotalPages headers present in the response
• Documentation updated to reflect singular route names

Environment

• Plugin: Ultimate Multisite
• API namespace: wu/v2
• Tested with: Bricks Builder Query Loop (API type)