MAINT: move dispersion plots

[Gui-FernandesBR]

Pull request type

Please check the type of change your PR introduces:

• Code maintenance (refactoring, formatting, renaming, tests)

Pull request checklist

Please check if your PR fulfills the following requirements, depending on the type of PR:

• Code base maintenance (refactoring, formatting, renaming):

  • Docs have been reviewed and added / updated if needed
  • Lint (black rocketpy) has passed locally and any fixes were made
  • All tests (pytest --runslow) have passed locally

What is the current behavior?

Some plots and prints still inside the Dispersion Class.

What is the new behavior?

New dedicated classes to _DispersionPlots and _DispersionPrints

Does this introduce a breaking change?

• Yes (functions being moved from one module to another (submodules)

Other information

• Let's merge this one into the enh/class_dispersion :)
• Updating the notebooks changes more than 8000 rows, when actually the PR changed at maximum 400 rows.

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[Gui-FernandesBR]

Tests not passing are not related to this PR. Basically, the Dispersion class is currently not working not even in the enh/class_dispersion branch.
But I solved what the PR asked, so the re-review was requested.

[Gui-FernandesBR]

The review was accomplished, merging this one without approval to fix the problems directly on the enh/class_dispersion branch