Improve error messages with #[diagnostic::do_not_recommend].

• Clarify documentation for Router::route_layer (#3567)

• changed: Make the typed-routing feature enable the routing feature (#3514)
• changed: Add trailing newline to ErasedJson::pretty response bodies (#3526)
• fixed: Fix integer underflow in FileStream::try_range_response for empty files (#3566)

• Relax implicit Send / Sync bounds on RouterAsService, RouterIntoService (#3555)
• Make it easier to visually scan for default features (#3550)
• Fix some documentation typos

• Make it easier to visually scan for default features (#3550)

• breaking: Remove unused async-stream feature, which was accidentally
  introduced as an implicit feature through an optional dependency which was no
  longer being used (#3298)
• breaking: option_layer now maps the Response body type to axum::body::Body (#3469)
• breaking: Some new features are added which need to be opted in (#3485).
  • Cached extractor requires cached feature.
  • The handler utilities require handler feature.
  • The middleware utilities require middleware feature.
  • OptionalPath extractor requires optional-path feature.
  • The routing utilities require routing feature.
  • WithRejection extractor requires with-rejection feature.
• breaking: Upgraded prost dependency to v0.14. (#3517)

• fixed: Reject JSON request bodies with trailing characters after the JSON document (#3453)
• added: Implement OptionalFromRequest for Multipart (#3220)
• added: Getter methods Location::{status_code, location}
• added: Support for writing arbitrary binary data into server-sent events (#3425)]
• added: middleware::ResponseAxumBodyLayer for mapping response body to axum::body::Body (#3469)
• added: impl FusedStream for WebSocket (#3443)
• changed: The sse module and Sse type no longer depend on the tokio feature (#3154)
• changed: If the location given to one of Redirects constructors is not a valid header value, instead of panicking on construction, the IntoResponse impl now returns an HTTP 500, just like Json does when serialization fails (#3377)
• changed: Update minimum rust version to 1.78 (#3412)

• added: Implement OptionalFromRequest for Host (#3177)

• fixed: Removed unused rustversion dependency (#3502)

• added: DefaultBodyLimit::apply for changing the DefaultBodyLimit inside extractors.
  (#3368)
• changed: Update minimum rust version to 1.78 (#3412)