Prod - Auto review

• /FreqTableExampleOriginal.java
• /IntListVer2.java

Summary by Bito

• Introduces several new Java utility classes, including an airline redemption system, a binary conversion tool, a frequency table generator, a dynamic integer list, and a demonstration of primitive parameter behaviors.
• Adds robust error handling, assertions, and comprehensive method implementations to ensure code reliability.
• Adds features to ease future enhancements.
• Overall summary: Introduces several new Java utility classes (airline redemption system, binary conversion tool, frequency table generator, dynamic integer list, and demonstration of primitive parameter behaviors); adds robust error handling, assertions, and comprehensive method implementations to ensure code reliability and lay groundwork for further feature development and testing improvements.