feat: add PatternPerturbation

Move by +/- d in random single coordinate.

feat: add uniform constructor for RandomDistributionPerturbation

feat: remove min, max from bounded perturbation

feat: add BoundedPerturbation

applies bounds on real numbers when performing the perturbation.

feat: add RandomDistributionPerturbation

For vectors of reals, perturb by a random distribution with
expectation in 0.

tests: move all tests to separate submodules

chore: split types and functions to separate module files