Add an encapsulated file stream in axum-extra to make it more conveni… #5047

Job	Run time
cargo-hack	5m 35s
check	44s
check-docs	24s
cargo-public-api-crates (axum)	30s
cargo-deny check (advisories)	23s
cargo-public-api-crates (axum-core)	22s
dependencies-are-sorted	18s
Spell Check with Typos	4s
cargo-deny check (bans licenses sources)	26s
cargo-public-api-crates (axum-extra)	32s
cargo-public-api-crates (axum-macros)	21s
test-msrv	0s
test-nightly	0s
test-docs	0s
armv5te-unknown-linux-musleabi	0s
test-versions	0s
wasm32-unknown-unknown	0s
	9m 39s

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