Customisable Fonts for themes

[giridharvc7]

Added an option to customise font in theme.

[raspu]

Hi thank you for your PR.
I understand why this may be useful, but the setCodeFont method on the Theme object is documented to explain what is happening internally and how can you further customize the theme fonts, this is important because there may be fonts that doesn't include the required variations (italic and bold) and if the user use them as argument the resulting product may no look as expected, with this change there's no clear indication on how to solve an issue like that.

To be honest, I am not really happy with current the setTheme method, I would like to change it to receive an initialized Theme rather than a theme name, so you can properly configure it before passing it.

[giridharvc7]

I understand.
Would wrapping bold, italics and regular font in a struct and passing it as an argument do the trick? I understand this is might not look good, but I cannot think of another way either 😅