feat: add eip-7702 helpers #2947

Job	Run time
doctest	1m 45s
wasm-unknown	54s
cfg-check	31s
clippy	55s
docs	58s
feature-checks	5m 16s
fmt	16s
no-std	18s
test ubuntu-latest stable --no-default-features	1m 25s
wasm-wasi	1m 35s
test ubuntu-latest stable	1m 27s
test ubuntu-latest nightly --no-default-features	1m 5s
test ubuntu-latest nightly	1m 8s
test ubuntu-latest 1.76 --no-default-features	42s
test ubuntu-latest 1.76	59s
test windows-latest stable --no-default-features	6m 33s
test windows-latest stable	5m 58s
test windows-latest nightly --no-default-features	4m 35s
test windows-latest nightly	3m 41s
test windows-latest 1.76 --no-default-features	3m 32s
test windows-latest 1.76	3m 37s
	47m 10s

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