feat: Restucturing Part7 Handler and Context rework #4521

Job	Run time
check no_std	23s
check	18s
check no_std kzg-rs	25s
check serde	20s
check std	18s
clippy	52s
fmt	6s
docs	48s
test stable --no-default-features	33s
TyposCheck	7s
test stable	37s
test stable --all-features	47s
test beta --no-default-features	28s
test beta	30s
test beta --all-features	46s
test nightly --no-default-features	43s
test nightly	39s
test nightly --all-features	29s
	9m 9s

Provide feedback