chore: move env to codes/eoa_lib

feat: add new terminating conditions (or, lower than, maximum cycles)

chore: remove unused imports

feat: add CloserThanTerminatingCondition

refactor: abstract LocalSearch stats into LocalSearchStats

refactor: extend local search to accept any inputs

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

chore: split types and functions to separate module files