sequence diagram enabled

• /FreqTableExampleOriginal.java
• /IntListVer2.java

Summary by Bito

• Extends the functionality of the airline routing module with file I/O and recursion capabilities.
• Converts the airlineNames variable to an array type in AirlineProblem.java for improved processing of input data.
• Adds new utilities for binary conversion, frequency table generation, and dynamic integer list implementation.
• Introduces an airline routing solution that utilizes file I/O and recursion.
• Includes a demonstration of primitive parameter behaviors.
• Overall summary: Adds diverse modules extending the project's functionality, including utilities for binary conversion, frequency tables, dynamic lists, enhanced airline routing with file I/O and recursion, primitive parameter demonstrations, and improved data processing capabilities.