lint

refactor the watcher (#462) #1544

Job	Run time
fmt	14s
docs	4m 31s
check-toml	9s
no_std (wasm, wasm32-unknown-unknown, scroll-engine,scroll-wire,rollup-node,scroll-network,rollup...	1m 26s
features	17m 18s
codespell	16s
clippy	4m 38s
zepter	51s
no_std (riscv, riscv32imac-unknown-none-elf, scroll-engine,scroll-wire,rollup-node,scroll-network...	1m 22s
udeps	4m 38s
	35m 23s

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