NiivueOptions syntax

[AnthonyAndroulakis]

Currently, the NiivueOptions for a Niivue widget can be accessed like so: nv.text_height.
However, this does not exactly mirror the method of accessing an option from a js Niivue object, which is like so: nv.opts.textHeight.

The naming difference (snake case vs camel case) is normal, however, the widget version is missing the "opts." text. Ideally, a Niivue widget could have one of its options modified like so:

from ipyniivue import Niivue
nv = Niivue()
nv.opts.text_height = 0.05

[hanayik]

@AnthonyAndroulakis, one option that we can look into is creating more "setter" and "getter" methods in the core NiiVue project.

So we could have something like nv.setTextHeight(newHeight), and nv.getTextHeight()

[AnthonyAndroulakis]

Good idea, that would be helpful.