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.

feat: add real fitness functions

Add linear, step, rastrigin, griewank and schwefel fitness functions
along with the tests for them.

Try using static vector where appropriate, but use OVector for those
where filling with zeros won't work. This is mostly a constrain for
the tests... rather than a real constrain. In the end the dimensions
will be given for each problem.

refactor: extend local search to accept any inputs

Instead of accepting only BinaryString, accept anything.
Extend the operators to accept anything.

tests: move all tests to separate submodules

tests: add rosenbrock test

feat: add MaximizingOperator

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

chore: split types and functions to separate module files

tests: let EqualTerminatingCondition remember matches to return even if no longer equal

tests: For local search test, wait 100 cycles after optimum found

feat: add AndTerminatingConditions that ands multiple conditions

chore: rename NoMatchForTerminatingCondition to NoBetterForTerminatingCondition

Initial commit