`blastoff.py` should be converted to a class `InfiniteGpt`

[robTheBuildr]

Acceptance Criteria

• __main__ should be re-written as run(...) that consumes an input and output file
• configure(...) should be written to consume
• All other functions (helpers) should be given underscore notation (ex: _split_into_chunks(...)) as syntactic sugar to denote that they are private
• All functions should be wrapped in an InfiniteGpt class