MNT: Refactor flight prints module

- F-strings as faster in python, let's use them!
- Added a docstring to the module!
- useless comments were removed
- docstrings were updated
- no code line is longer than 88 columns (pylint and flake8 restriction)
- improve parachute printing

CHANGELOG.md

@@ -37,6 +37,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Changed
 
+- MNT: Refactor flight prints module [#758](https://github.com/RocketPy-Team/RocketPy/pull/578)
 - DOC: Convert CompareFlights example notebooks to .rst files [#576](https://github.com/RocketPy-Team/RocketPy/pull/576)
 - ENH: Optional argument to show the plot in Function.compare_plots [#563](https://github.com/RocketPy-Team/RocketPy/pull/563)