Feat: Borsh deser using unsafe #957

Job	Run time
Cargo deny check	24s
Docs	50s
Clippy	55s
Feature checks	52s
Fmt	11s
test (stable, --no-default-features)	1m 0s
test (stable)	1m 7s
test (stable, --all-features)	2m 3s
test (beta, --no-default-features)	1m 3s
test (beta)	1m 5s
test (beta, --all-features)	2m 13s
test (nightly, --no-default-features)	52s
test (nightly)	55s
test (nightly, --all-features)	1m 57s
test (1.65, --no-default-features)	14s
test (1.65)	14s
Accept	1s
	15m 56s

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