chore(engine): Migrate types in engine rpc types from `op-alloy` (#5) #18

Job	Run time
doctest	43s
test stable --no-default-features	42s
wasm-unknown	36s
test stable	51s
test stable --all-features	50s
clippy	37s
test nightly --no-default-features	45s
docs	27s
examples	54s
test nightly	1m 0s
test nightly --all-features	59s
feature-checks	44s
fmt	14s
test 1.81 --no-default-features	33s
no-std	29s
test 1.81	38s
wasm-wasi	1m 1s
cfg-check	34s
feature-powerset	1m 26s
	14m 3s

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