feat: add initializers, ZeroInitializer, RandomInitializer

refactor: Add dimension generic to BinaryString

chore: remove unused imports

refactor: properly handle errors in local_search

refactor: Use OVector instead of SVector in library

fix: put Rng to Box instead of generics

tests: move all tests to separate submodules

chore: guard test imports by #[cfg(test)]

chore: split types and functions to separate module files