Improve spacing and control over text

[jameshball]

Currently, text in osci-render is badly formatted and doesn't scale well when lots of text is entered.

Some issues:

• By default, JUCE moves long text onto new lines, which should be togglable
• Text size should be controllable
• Line spacing should be controllable
• Character spacing should be controllable
• Text alignment should be controllable

It would be amazing (and probably pretty easy!) to integrate https://github.com/MNSignalProcessing/BarelyML which allows for markdown rendering by creating an AttributedString that we can iterate over and easily add to the GlyphArrangement that is used currently with GlyphArrangement.addJustifiedText