We need to implement the `initial_solution` init parameter for the `Flight` class, as noted in the TODO comment in `lib/models/flight.py`. Reference PR: https://github.com/RocketPy-Team/Infinity-API/pull/25 Reference comment: https://github.com/RocketPy-Team/Infinity-API/pull/25#discussion_r1753076737 Requested by @GabrielBarberini.