Update ClassParser.java

[jjestrada2]

Refactored ClassParser to Use instanceof for ZIP/JAR Detection

Problem:

The previous implementation used getClass().getName() to detect if an InputStream was from a ZIP/JAR file. This approach relied on string matching, which was inefficient and prone to break if class names changed.

Solution:

• Replaced reflection-based detection with instanceof checks for ZipInputStream and JarInputStream.
• Improved maintainability by eliminating unnecessary string operations.
• Added missing imports for ZipInputStream and JarInputStream.

Testing:

• Ran mvn clean install successfully.
• Verified existing tests pass.
• No breaking changes observed.