Add an encapsulated file stream in axum-extra to make it more conveni… #5050

Job	Run time
cargo-hack	1m 16s
check	1m 1s
check-docs	42s
cargo-public-api-crates (axum)	38s
cargo-public-api-crates (axum-core)	24s
cargo-deny check (advisories)	25s
cargo-public-api-crates (axum-extra)	37s
dependencies-are-sorted	26s
cargo-deny check (bans licenses sources)	24s
Spell Check with Typos	7s
cargo-public-api-crates (axum-macros)	21s
test-msrv	2m 29s
test-nightly	1m 47s
armv5te-unknown-linux-musleabi	1m 3s
test-docs	1m 36s
wasm32-unknown-unknown	18s
test-versions (stable)	3m 37s
test-versions (beta)	1m 45s
	18m 56s

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