[AB3: Tracing Code] Explore paths that throw exceptions

[UdhayaShan1]

Current

Tutorial primarily focuses on a single "happy path" scenario.

Problem

Users may not be familiar with how exceptions are thrown and handled, particularly CommandException and ParseException. This lack of understanding could lead to confusion, especially in subsequent tutorials that involve adding commands and handling these exceptions.

Proposed Solution

Enhance the tutorial by including examples of CommandException and ParseException being thrown and traced. This will help users understand the flow of these exceptions and how to manage them effectively in their code. This can be added before the Conclusion which also has other examples of possibly problem user inputs.