lint

feat: improve rpc namespace #1513

Job	Run time
clippy	4m 24s
fmt	17s
check-toml	8s
udeps	4m 52s
features	8m 5s
no_std (wasm, wasm32-unknown-unknown, scroll-engine,scroll-wire,rollup-node,scroll-network,rollup...	1m 23s
zepter	56s
no_std (riscv, riscv32imac-unknown-none-elf, scroll-engine,scroll-wire,rollup-node,scroll-network...	1m 18s
docs	4m 35s
codespell	14s
	26m 12s

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