ECOSYSTEM.md: Add axum-kit and fix formatting inconsistencies #5288

Job	Run time
check-docs	26s
cargo-public-api-crates (axum)	59s
cargo-hack	2m 59s
check	45s
cargo-public-api-crates (axum-core)	45s
cargo-deny check (advisories)	26s
cargo-public-api-crates (axum-extra)	54s
dependencies-are-sorted	18s
Spell Check with Typos	6s
cargo-deny check (bans licenses sources)	24s
cargo-public-api-crates (axum-macros)	46s
test-nightly	1m 12s
armv5te-unknown-linux-musleabi	21s
test-msrv	2m 56s
test-docs	1m 24s
test-versions (stable)	1m 26s
wasm32-unknown-unknown	11s
test-versions (beta)	1m 20s
	17m 38s

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