fix(w3c/sotd): adjust pluralization of Working Group for CRD/CRYD

[marcoscaceres]

Summary

• Pluralizes "Working Group" to "Working Groups" and "intends" to "intend" when multiple WGs are listed in CRD/CRYD SoTD
• Handles single-element arrays correctly
• Adds withContext to parameterized test loop

Based on @kfranqueiro's work in #5166, rebased on main. This is high priority as the incorrect text blocks W3C autopublishing for multi-WG CRDs.

Closes #5166

Test plan

• Tests cover single group, single-group-in-array, and multiple groups for both CRD and CRYD

[Copilot]

Pull request overview

Updates the W3C SoTD template text for CRD/CRYD to correctly pluralize “Working Group(s)” and “intend(s)” when multiple Working Groups are configured, aligning output with pubrules expectations and preventing autopublishing failures for multi-WG documents.

Changes:

• Adjust CRD/CRYD SoTD wording to use “Working Groups intend” when conf.multipleWGs is true.
• Add/extend W3C group tests to cover CRD/CRYD for single group, single-element array, and multiple groups (with clearer test context).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/w3c/templates/sotd.js	Updates CRD/CRYD status explanation strings to pluralize based on conf.multipleWGs.
tests/spec/w3c/group-spec.js	Adds parameterized tests to assert correct “Working Group(s) intend(s)” output across CRD/CRYD scenarios.

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[marcoscaceres]

@sidvishnoi this fixes the CRD/CRYD pluralization that's blocking W3C autopublishing for multi-WG specs. Cherry-picked from @kfranqueiro's #5166 (they haven't been able to rebase). Added withContext to the test loop.