feat: additional vec apis (#2) #31

Job	Run time
Linting	15s
Test (ubuntu-latest)	14s
Test (ubuntu-latest, --release)	17s
Test (ubuntu-latest, --features=no_std)	20s
Test (ubuntu-latest, --features=no_std, --release)	15s
Test (windows-latest)	1m 27s
Test (windows-latest, --release)	1m 35s
Test (windows-latest, --features=no_std)	1m 34s
Test (windows-latest, --features=no_std, --release)	1m 34s
Test (macos-latest)	17s
Test (macos-latest, --release)	20s
Test (macos-latest, --features=no_std)	19s
Test (macos-latest, --features=no_std, --release)	18s
Test (macos-12)	35s
Test (macos-12, --release)	35s
Test (macos-12, --features=no_std)	38s
Test (macos-12, --features=no_std, --release)	32s
	11m 5s

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