ECOSYSTEM.md: Add axum-kit and fix formatting inconsistencies #5287

Job	Run time
cargo-hack	2m 50s
cargo-public-api-crates (axum)	52s
check	39s
check-docs	51s
cargo-public-api-crates (axum-core)	39s
cargo-deny check (advisories)	24s
cargo-public-api-crates (axum-extra)	46s
dependencies-are-sorted	20s
cargo-deny check (bans licenses sources)	27s
Spell Check with Typos	6s
cargo-public-api-crates (axum-macros)	36s
test-docs	1m 23s
test-msrv	2m 46s
armv5te-unknown-linux-musleabi	55s
test-nightly	1m 16s
test-versions (stable)	1m 16s
wasm32-unknown-unknown	15s
test-versions (beta)	1m 11s
	17m 32s

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