Review feedback

[nieldw]

I received the following, high level, feedback:

Positive

- Some separation of concern.
- Good unit test coverage.

Negative (Major)

- The solution does not work fully.
- Why mixing Kotlin and Java? It actually brings performance issues, rather than having one single language support (either Java or Kotlin).
- Inline regular expression definition (e.g., line 43 of class MultiLineKnapsackProblemParser).
- Code has big maintainability issue (e.g., class ZeroOneKnapsackSolver), he tried to have a relatively micro separation of concern, but none of the classes tells the clear intent of usage

I hope you can find yourself in the feedback provided...