Add separated component field plotting

[lucasgrjn]

Solve the issue #90 from @lukasc-ubc

Implement plot_component to allow the user to set the field, the direction and the part (real, imaginary or absolute value) to be plotted.

[HelgeGehring]

Looks great!
How could we keep it backwards compatible? (At least for the next few versions with a deprecation warning)

[lucasgrjn]

Looks great! How could we keep it backwards compatible? (At least for the next few versions with a deprecation warning)

Good idea! I will take a look into that

[lucasgrjn]

I see to possible way:

1. the easiest will be to replace the actual .show() by another function like .plot()
2. just to get some keywords and throw the deprecation warning depending on which one

I prefer the first one since it will enforce people to "learn" to use the new function. What do you think?

[lucasgrjn]

Now, with the last commits, the function should be backward compatible!

[HelgeGehring]

Looks amazing! Just some minor tweaks and then we can merge!

[HelgeGehring]

Looks amazing, I'm soo close to approving!

[HelgeGehring]

Suggested change

	title: str = "E",
	title: Optional[str] = None,

That way we could use field (if it's a Literal) as the title in case the user doesn't define anything?

[HelgeGehring]

just as a small extra: when you pass it on to the new function, could you add there for the title

title = field if title is None else title

[lucasgrjn]

I am not sure about this one. If the user does not want to add a title, should we really enforce one?

[HelgeGehring]

I think like this we get titles for all the fields in case we don't set anything ,right?

[HelgeGehring]

What do you think? I think once we add that we're done?