Add comprehensive Javadoc documentation to all Java classes

[Copilot]

Overview

This PR improves the Java documentation for the Number Guessing Game project by adding comprehensive Javadoc comments to all public classes, methods, and fields. This enhancement significantly improves the quality of auto-generated Javadoc documentation.

Changes

Added complete Javadoc documentation to all 11 Java source files in the project:

Core Game Classes

• Main.java - Entry point with detailed method documentation
• GameLogic.java - Game loop and logic documentation
• GameInfo.java - Project information methods
• GUI.java - Graphical interface components

Helper Classes

• ScannerHelper.java - User input handling utilities
• RandomNumber.java - Random number generation
• CheckGuess.java - Input validation with exception documentation
• DebugInfo.java - Debug information display
• SystemInfo.java - JVM properties access

Utility Classes

• ReadVersionFile.java - Version information
• Username.java - Placeholder for future high score system

Documentation Standards

All documentation follows proper Javadoc conventions:

• ✅ Class-level documentation describing purpose and functionality
• ✅ Method documentation with @param and @return tags
• ✅ Field documentation for public members
• ✅ @throws annotations for methods that throw exceptions
• ✅ Clear, descriptive comments suitable for API documentation

Impact

Before: Javadoc generation produced 26+ warnings for missing documentation
After: Javadoc generation produces 0 warnings ✨

The generated HTML documentation is now professional and comprehensive, making it easier for developers to understand and use the codebase. This is particularly important for the online Javadoc hosted at https://project516.github.io/NumberGuessingGame.

Testing

• ✅ All existing tests pass
• ✅ Build completes successfully
• ✅ Javadoc generation verified with no warnings or errors
• ✅ Generated HTML documentation reviewed and confirmed to be properly formatted

Fixes #issue_number

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Javadocs</issue_title>
<issue_description>improve the java documentation for the auto generated javadocs </issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #54

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