polkadot-sdk-docs: Use command_macro! #7644

Job	Run time
preflight / preflight	41s
preflight / ci-versions	1m 0s
cargo-check-benches (master)	27m 43s
test-frame-ui	53m 24s
cargo-check-benches (current)	27m 54s
test-full-crypto-feature	9m 32s
test-node-metrics	15m 21s
cargo-check-all-crate-macos	11m 44s
cargo-check-each-crate (1)	25m 39s
cargo-check-each-crate (2)	25m 55s
cargo-check-each-crate (3)	15m 21s
cargo-check-each-crate (4)	24m 3s
cargo-check-each-crate (5)	31m 17s
cargo-check-each-crate (6)	21m 52s
cargo-check-each-crate (7)	34m 14s
test-frame-examples-compile-to-wasm	9m 54s
check-tracing	9m 17s
test-deterministic-wasm	13m 30s
check-metadata-hash	13m 10s
node-bench-regression-guard	12s
All test misc tests passed	1s
	6h 11m 44s

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