* OpenAPI: render deprecated badge for deprecated operations
Show a yellow "Deprecated" badge for any OpenAPI operation marked
`deprecated: true`. The badge appears in two places: inline with the
operation heading when `showTitle` is true, and as a standalone header
above the playground card when `showTitle` is false (which is the
default for individual operation pages generated by `openapiSource`).
This restores the behaviour originally added in #2417, which was lost
during the v9→v10 move of the operation renderer from
`packages/openapi/src/render/operation/index.tsx` to
`packages/openapi/src/ui/operation/index.tsx`. The parameter-level,
schema-property-level and auth-scheme-level deprecated badges all
survived the refactor; the operation-level one was silently dropped.
The example spec's `deletePlanet` operation already claimed in its
description to be deprecated but never set the flag (inherited from the
upstream Scalar Galaxy fixture). Setting it both fixes the
inconsistency and provides a visible demo for the new badge.
* OpenAPI: improve operation deprecation styles
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Co-authored-by: Fuma Nama <[email protected]>
