lint

feat: improve rpc namespace #1514

Job	Run time
clippy	17s
fmt	18s
check-toml	9s
udeps	14s
docs	17s
codespell	13s
features	14s
no_std (riscv, riscv32imac-unknown-none-elf, scroll-engine,scroll-wire,rollup-node,scroll-network...	14s
zepter	25s
no_std (wasm, wasm32-unknown-unknown, scroll-engine,scroll-wire,rollup-node,scroll-network,rollup...	18s
	2m 39s

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