[WIP] Overhaul overclocking and parallel calculation

[joegnis]

Progress

• Reimplement OverclockCalculator
• Reimplement ParallelHelper
  • Done for not considering input limit, but in reality we should, as it determines parallel
• Review for the latest version (now referring to GTNH 2.6.1)

Should fix after done

• Implement tick rounding #48

Some ideas

• We may move calculation logic into a companion mod which directly calls code in Java codebase and returns results to Python program, so we don't need to rewrite logic in Python. I have no mod dev experience so I don't know about the viability, but during implementation of this overhaul, I have managed to get results from Calculator and Helper in a functional test (which is run by a mod).