Enh/titles in function plots

[FranzYuri]

Pull request type

Please check the type of change your PR introduces:

• Code base additions (bugfix, features)
• Code maintenance (refactoring, formatting, renaming, tests)
• ReadMe, Docs and GitHub maintenance
• Other (please describe):

Pull request checklist

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

• ReadMe, Docs and GitHub maintenance:

  • Spelling has been verified
  • Code docs are working correctly

• 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

• Code base additions (for bug fixes / features):

  • Tests for the changes have been added
  • 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?

Currently plots using Function's plot1D() and plot2D() methods automatically gives the title for the graphs.

What is the new behavior?

Now plots' titles can be defined either in the construction of the function or via the method setTitle(title)

Does this introduce a breaking change?

• Yes
• No

Other information

Enter text here...

[MateusStano]

Please check the documentation of plot1D and plot2D methods. The title is mentioned there and the docs needs some changes to adequate the changes here.