fix(json-schema-5-samples): unwrap schema example referencing components.examples

[yogeshwaran-c]

Description

When a schema property's example keyword is {$ref: '#/components/examples/X'}, the rendered example incorrectly includes a value: wrapper key.

Root cause

swagger-client's ref resolver (refs.js) substitutes the resolved Example Object verbatim — only response/requestBody/parameter examples[*].value paths are on its skip list. So a schema-level example: { \$ref: '#/components/examples/X' } is replaced with { value: <user data>, \$\$ref: '#/components/examples/X' }.

sampleFromSchemaGeneric in src/core/plugins/json-schema-5-samples/fn/index.js then reads that object as the literal sample, leaving the value: wrapper visible in the rendered output. The same example referenced from a response's examples: block does not hit this code path and renders correctly (the asymmetry described in the issue).

Fix

A new helper unwrapTopLevelExampleReference checks whether the top-level example object has both a \$\$ref matching #/components/examples/ and an own value key. Only that exact shape (which swagger-client injects deterministically for resolved Example Objects) is unwrapped; everything else passes through untouched.

The fix is intentionally conservative:

• It only fires when the resolver's distinctive Example-Object marker (\$\$ref pointing into #/components/examples/) is present.
• It is top-level only — nested occurrences are left to sanitizeRef exactly as before, so existing tests at test/unit/core/plugins/json-schema-5-samples/fn/index.js:294 and :324 are unaffected.
• User-authored objects with a literal value key (no \$\$ref) or with a \$\$ref pointing elsewhere are preserved verbatim.

Motivation and Context

Fixes #5748.

How Has This Been Tested?

• Unit: updated the existing root-level \$\$ref test in test/unit/core/plugins/json-schema-5-samples/fn/index.js to expect the unwrapped shape, and added two new negative tests (no \$\$ref; \$\$ref pointing outside #/components/examples/). Full file: 121 tests pass.
• Cypress (CI): new fixture test/e2e-cypress/static/documents/bugs/5748.yaml reproduces the issue's repro spec; new spec test/e2e-cypress/e2e/bugs/5748.cy.js asserts the rendered example contains the inner keys (Individual, Variant) and does not contain the \"value\": wrapper.
• Lint: eslint --max-warnings 0 clean on changed files.

Checklist

• Bug fix (non-breaking change which fixes an issue)
• My change requires no documentation update
• I have added tests to cover my changes
• All new and existing tests passed