feat: additional vec apis #22

Job	Run time
Linting	15s
Test (ubuntu-latest)	17s
Test (ubuntu-latest, --release)	15s
Test (ubuntu-latest, --features=no_std)	17s
Test (ubuntu-latest, --features=no_std, --release)	17s
Test (windows-latest)	1m 35s
Test (windows-latest, --release)	1m 52s
Test (windows-latest, --features=no_std)	1m 43s
Test (windows-latest, --features=no_std, --release)	2m 25s
Test (macos-latest)	21s
Test (macos-latest, --release)	25s
Test (macos-latest, --features=no_std)	21s
Test (macos-latest, --features=no_std, --release)	23s
Test (macos-12)	34s
Test (macos-12, --release)	33s
Test (macos-12, --features=no_std)	37s
Test (macos-12, --features=no_std, --release)	36s
	12m 46s

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