preprod

• /LoopTrap.java
• /DivideFail.java
• /IndexBreaker.java
• /NullCrash.java

Summary by Bito

This PR adds multiple Java classes that serve as examples of common programming bugs and errors, along with one correct implementation, potentially for educational or testing purposes.

Detailed Changes

• Adds CastCrash.java demonstrating a ClassCastException from casting a String to float in CastCrash.java.
• Adds DivideFail.java showing an ArithmeticException caused by multiplication with zero in DivideFail.java.
• Adds IndexBreaker.java illustrating an ArrayIndexOutOfBoundsException in array access in IndexBreaker.java.
• Adds NullCrash.java causing a NullPointerException when calling methods on null references in NullCrash.java.
• Adds LoopTrap.java with an infinite loop due to omitted increment in the condition in LoopTrap.java.