NewWindowWarning: add no-aria-label modifier and disabled flag

[Copilot]

The New Window Warning fix had modifier classes to suppress the icon and tooltip independently, but no way to block the aria-label update or disable all NWW behavior entirely for a given container.

New modifier classes

edac-nww-no-aria-label / anww-no-aria-label
Skips updateAriaLabel() for links within the container. Icon and tooltip still apply normally.

edac-nww-disabled / anww-disabled
Disables all NWW features (icon, aria-label, tooltip) for links within the container. Links are still marked data-nww-processed to prevent re-evaluation on subsequent runs (e.g. FacetWP refresh).

<!-- Suppress only aria-label update -->
<div class="edac-nww-no-aria-label">
  <a href="https://example.com" target="_blank">Already labelled link</a>
</div>

<!-- Disable NWW entirely -->
<div class="edac-nww-disabled">
  <a href="https://example.com" target="_blank">Unaffected link</a>
</div>

Both classes follow the existing anww-* / edac-nww-* dual-prefix convention and apply to both target="_blank" and window.open link types.

CSS

The disabled flag also hides any icons at the CSS level (consistent with the .edac-nww-no-icon pattern) as a safety net.