feat(`sol!`): make `#[sol(rpc)]` default if `rpc` feat enabled #2286

Job	Run time
wasm	19s
test ubuntu-latest stable --no-default-features	47s
clippy	23s
check no_std	32s
test ubuntu-latest stable	53s
docs	32s
test ubuntu-latest nightly --no-default-features	55s
features stable	1m 49s
test ubuntu-latest nightly	54s
fmt	10s
features stable --all-targets	2m 55s
miri --no-default-features	5m 21s
test ubuntu-latest 1.81 --no-default-features	25s
miri	5m 25s
features nightly	1m 43s
test ubuntu-latest 1.81	29s
features nightly --all-targets	2m 50s
miri --all-features	8m 5s
test windows-latest stable --no-default-features	2m 38s
test windows-latest stable	2m 43s
test windows-latest nightly --no-default-features	2m 12s
test windows-latest nightly	2m 9s
test windows-latest 1.81 --no-default-features	1m 16s
test windows-latest 1.81	1m 17s
test ubuntu-latest 1.81 --features json	31s
test windows-latest 1.81 --features json	1m 32s
test ubuntu-latest nightly --all-features	50s
test windows-latest nightly --all-features	2m 1s
deny / cargo deny check	16s
ci success	2s
	51m 54s

Provide feedback