Printing felt representation of types (currently on top of #65)

[DomHenderson]

Pull Request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build-related changes
• Documentation content changes
• Testing
• Other (please describe):

What is the current behavior?

Currently we print either the raw value representing the felt return, or each field of the presumed to be non-nested struct. Additionally print_felt and print_double_felt are always included in the output, and felt values can be printed that are outside the range of [0, PRIME)

Issue Number: N/A

What is the new behavior?

• Main will print the felt representation of arbitrarily nested complex types
• print_felt and print_double_felt will be included in the code iff a flag is passed to the cli
• felt values that are printed from main will be wrapped. print_felt and print_double_felt will print raw values for debugging purposes

Does this introduce a breaking change?

• Yes
• No

Other information

Relevant files to look at in files changed are process/statements.rs and statements_processing/print/print_felt_representation.rs