feat: Restucturing Part7 Handler and Context rework #4533

Job	Run time
clippy	37s
docs	56s
check	26s
check no_std	27s
check serde	27s
check no_std kzg-rs	30s
check std	25s
test stable --no-default-features	37s
test stable	33s
test stable --all-features	58s
test beta --no-default-features	36s
fmt	12s
TyposCheck	7s
test beta	38s
test beta --all-features	59s
test nightly --no-default-features	34s
test nightly	37s
test nightly --all-features	1m 3s
	10m 42s

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