feat: Restucturing Part7 Handler and Context rework #4534

Job	Run time
check no_std	27s
clippy	1m 0s
check	26s
check no_std kzg-rs	31s
docs	57s
check serde	28s
check std	25s
fmt	15s
test stable --no-default-features	35s
TyposCheck	5s
test stable	31s
test stable --all-features	1m 0s
test beta --no-default-features	38s
test beta	34s
test beta --all-features	1m 0s
test nightly --no-default-features	30s
test nightly	31s
test nightly --all-features	57s
	10m 50s

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