feat(rpc-types-mev): Add support for `Bundle` inside `BundleItem` #4306

Job	Run time
cfg-check	1m 13s
clippy	53s
docs	1m 28s
check no_std	28s
doctest	1m 9s
feature-checks	1m 10s
fmt	12s
test ubuntu-latest stable --no-default-features	1m 8s
wasm-unknown	1m 9s
test ubuntu-latest stable	1m 10s
wasm-wasi	1m 9s
test ubuntu-latest stable --all-features	1m 10s
test ubuntu-latest nightly --no-default-features	1m 24s
test ubuntu-latest nightly	1m 17s
test ubuntu-latest nightly --all-features	1m 18s
test ubuntu-latest 1.79 --no-default-features	54s
test ubuntu-latest 1.79	57s
test windows-latest stable --no-default-features	57s
test windows-latest stable	1m 4s
test windows-latest stable --all-features	1m 1s
test windows-latest nightly --no-default-features	2m 35s
test windows-latest nightly	2m 38s
test windows-latest nightly --all-features	2m 37s
test windows-latest 1.79 --no-default-features	58s
test windows-latest 1.79	57s
	30m 56s

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