feat(`sol!`): make `#[sol(rpc)]` default #2270

Job	Run time
clippy	43s
docs	36s
check no_std	37s
features stable	1m 32s
features stable --all-targets	2m 56s
fmt	11s
features nightly	1m 58s
miri --no-default-features	5m 27s
features nightly --all-targets	3m 14s
miri	5m 29s
wasm	23s
miri --all-features	8m 42s
test ubuntu-latest stable --no-default-features	57s
test ubuntu-latest stable	59s
test ubuntu-latest nightly --no-default-features	49s
test ubuntu-latest nightly	46s
test ubuntu-latest 1.81 --no-default-features	30s
test ubuntu-latest 1.81	27s
test windows-latest stable --no-default-features	4m 30s
test windows-latest stable	3m 21s
test windows-latest nightly --no-default-features	2m 20s
test windows-latest nightly	1m 51s
test windows-latest 1.81 --no-default-features	1m 6s
test windows-latest 1.81	1m 34s
test ubuntu-latest 1.81 --features json	36s
test windows-latest 1.81 --features json	1m 13s
test ubuntu-latest nightly --all-features	1m 6s
test windows-latest nightly --all-features	2m 28s
deny / cargo deny check	18s
ci success	1s
	56m 40s

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