#48in24: Add analyzer feedback for Knapsack

[sanderploegsma]

The Knapsack exercise on the Java track is being featured in the #48in24 challenge, which means that we expect an influx of students attempting to solve it during that week.

It would be nice if the exercise contains some more content by that time.
One example of this is to add analyzer feedback for the exercise, to provide automated feedback on submitted solutions.

Adding analyzer feedback is done in three steps:

1. Create (or update) the .meta/design.md file for the exercise explaining what type of feedback the analyzer should provide (example for the Leap exercise).
2. Add the copy for the analyzer comments to exercism/website-copy.
3. Implement the analyzer rules in exercism/java-analyzer.

[sougat818]

Hello @sanderploegsma . Happy New Year. I have some time in the next few weeks to contribute. Please let me know if this is still worth doing or feel free to suggest a different issue.

Thanks 🙏

[kahgoh]

Hi @sougat818, I've assigned this to you to allow you to work on this one. As part mentioned in @sanderploegsma's comment above, the first part is that we'll need to decide what the analyzer should check and provide feedback for. Do you have thoughts on what the analyzer could check for?