fix(api): display all served crd versions seperatley in API documentation

[haarchri]

The API documentation was only displaying one version per CRD resource, even when multiple versions were marked as served: true.

For example, the CompositeResourceDefinition CRD has both v1 (deprecated, storage version) and v2 (active, non-storage version), but only v1 was being shown.

This occurred because:

• The template logic selected a single "preferred" version using getVersionAndSchema
• The selection logic prioritized the storage version (v1) over newer served versions (v2)
• Only one entry was generated per CRD file
• Additionally, when attempting to show multiple versions, clicking on any version would expand/collapse ALL versions of that CRD because they shared the same DOM element ID.

Fixes: #1011

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[jeanduplessis]

LGTM, thanks for the fix @haarchri