Add vector.random for symmetry

[user202729]

Function	Have?
random_matrix	✓
matrix.random	✓
random_vector	✓
vector.random	✗

[eslteacher902010]

Hi! If this is still unclaimed, I’d take it on.

I’m still getting familiar with the codebase, but from what I understand, this is about adding a vector.random function for consistency with similar methods like matrix.random.

I’ll review how random_vector() and matrix.random are implemented and see how vector.random could be added in a similar way. If I run into any blockers, I’ll follow up here. Thanks!