Tests

feat: make journal entries generic (#2154) #2

Job	Run time
check serde	22s
check no_std	25s
clippy	1m 7s
check no_std kzg-rs	29s
test stable --no-default-features	34s
check	57s
test beta --no-default-features	34s
fmt	9s
test beta --all-features	1m 4s
check std	20s
test stable	35s
TyposCheck	10s
docs	1m 9s
test nightly	33s
test nightly --no-default-features	37s
test nightly --all-features	1m 7s
test stable --all-features	57s
test beta	35s
	11m 44s

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