#[deprecated]Expand description
Attribute that marks an item as deprecated with a doc badge.
Emits the native #[deprecated(since=..., note=...)] so consumers don’t
need a second attribute. The macro name shadows the built-in #[deprecated]
only inside the same use-scope — emit it via the qualified path
#[oxicode_api_stability::deprecated(...)] or by importing under a different
name (use oxicode_api_stability::deprecated as oxicode_deprecated;) if you also
need the built-in.
Accepts: since = "0.XX.0" (required), note = "..." (optional).