lint

feat: improve rpc namespace #1523

Job	Run time
clippy	53s
check-toml	6s
fmt	16s
no_std (riscv, riscv32imac-unknown-none-elf, scroll-engine,scroll-wire,rollup-node,scroll-network...	44s
udeps	3m 59s
features	3m 26s
no_std (wasm, wasm32-unknown-unknown, scroll-engine,scroll-wire,rollup-node,scroll-network,rollup...	36s
docs	1m 0s
zepter	52s
codespell	15s
	12m 7s

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