port baseline replanning heuristic from hive-distributed codebase

[robfitzgerald]

we implemented a replanning algorithm from literature in hive-distributed which could be ported to the open source codebase. that solution used the network partitions as a target, so a hive-core solution might need a file source that provides zones for assignment. replanning was triggered by a global demand model; here, it would need to be triggered by a similar mechanism, but this should be moved into the state of the replanning dispatcher.

after porting the code, it should be tested in the manhattan scenario w/ 200 vehicles to see if it improves level of service, and if we see an increase in replanning states. open to discussion on whether it is activated by default.