lint

feat: improve rpc namespace #1515

Job	Run time
docs	56s
fmt	14s
udeps	3m 52s
codespell	10s
check-toml	7s
zepter	58s
features	9m 2s
clippy	53s
no_std (wasm, wasm32-unknown-unknown, scroll-engine,scroll-wire,rollup-node,scroll-network,rollup...	37s
no_std (riscv, riscv32imac-unknown-none-elf, scroll-engine,scroll-wire,rollup-node,scroll-network...	44s
	17m 33s

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