feat: additional vec apis #18

Job	Run time
Linting	22s
Test (ubuntu-latest)	16s
Test (ubuntu-latest, --release)	16s
Test (ubuntu-latest, --features=no_std)	14s
Test (ubuntu-latest, --features=no_std, --release)	15s
Test (windows-latest)	1m 26s
Test (windows-latest, --release)	1m 26s
Test (windows-latest, --features=no_std)	2m 22s
Test (windows-latest, --features=no_std, --release)	1m 39s
Test (macos-latest)	28s
Test (macos-latest, --release)	19s
Test (macos-latest, --features=no_std)	20s
Test (macos-latest, --features=no_std, --release)	22s
Test (macos-12)	40s
Test (macos-12, --release)	35s
Test (macos-12, --features=no_std)	40s
Test (macos-12, --features=no_std, --release)	50s
	12m 30s

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