Add an encapsulated file stream in axum-extra to make it more conveni… #5095

Job	Run time
check-docs	32s
check	49s
cargo-public-api-crates (axum)	31s
cargo-hack	4m 29s
cargo-public-api-crates (axum-core)	20s
cargo-deny check (advisories)	31s
dependencies-are-sorted	19s
cargo-public-api-crates (axum-extra)	40s
Spell Check with Typos	5s
cargo-deny check (bans licenses sources)	24s
cargo-public-api-crates (axum-macros)	20s
test-nightly	1m 29s
armv5te-unknown-linux-musleabi	33s
test-msrv	2m 37s
test-docs	1m 43s
test-versions (stable)	2m 24s
test-versions (beta)	1m 38s
wasm32-unknown-unknown	30s
	19m 54s

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