Cleanup and compiler errors

[Aidan-Sheedy]

Summary of both commits:

CHANGES

• Fixed timestamps "pretty_string" function
• Updated missing or incorrect block comments in most classes
• Cleaned up unnecessary empty "class Simulator" statements
• ixed all compiler errors. List is as follows:
  1. Added [[maybe_unused]] to argc and **argv in main. These may be used later, but since they are required params for the main function this is the only option unless we end up using them.
  2. Upadted all "catch" expressions to catch the exception by address, not value
  3. Added return lines to functions missing a return
  4. Removed #pragma once from cpp files
  5. Removed unnecessary int to uint casting
  6. Added lines to use unused parameters if necessary (some of these may need future improvements)
  7. Updated all exceptions to use "const char" instead of "char" parameters