KoreJson.getDoubleArrFromJson is broken

KoreJson.getDoubleArrFromJson does not correctly parse arrays of doubles! This leads to kore being incorrect (zero) in Board.

https://github.com/Kaggle/kaggle-environments/blob/ec90612db9c035af91b26f029a862e6b1a185ff6/kaggle_environments/envs/kore_fleets/starter_bots/java/kore/KoreJson.java#L88

Proposed fix:
```java
for (int i = 0; i < arrStrParts.length; i++) {
```

Open starter_bots/java/kore/KoreJson.java at the linked getDoubleArrFromJson implementation around line 88. Check how the array string is split and compare the loop bound with the proposed fix. Done means arrays of doubles parse correctly so the kore value in Board is no longer zero; no test file is mentioned.

Written by the indexing model from the issue text.