Draft: Update 2 files

• /FreqTableExampleOriginal.java
• /IntListVer2.java

Summary by Bito

• Added 5 new Java files: AirlineProblem.java, BinaryConverter.java, FreqTableExampleOriginal.java, IntListVer2.java, and PrimitiveParameters.java
• AirlineProblem implements graph traversal using depth-first search to find airline partnership paths for mile redemption
• BinaryConverter provides integer to binary string conversion with validation for binary digit strings
• FreqTableExampleOriginal creates character frequency tables from URLs and files with exception handling
• IntListVer2 implements a dynamic integer list with auto-resizing, equality comparison, and dual string representations
• PrimitiveParameters demonstrates Java's pass-by-value semantics for primitive types in method calls