[feature] use colors from current vim color scheme

[masukomi]

The default color scheme looks great, but many of us spent a lot of time tweaking our color schemes to meet our aesthetic. It'd be great if those colors were maintained in the image.

It looks like this should be possible via silicon's --theme <THEME> option although I have no idea what format they use or how hard it would be to convert the current vim scheme to that.... maybe just let us specify a theme after / if we've done the conversion ourselves?

[segeljakt]

I believe the format of the theme files is .tmTheme, which is used by Sublime Text.

It would be really cool like you say if the plugin defaults to generating with the vim color scheme. I'll do some more investigation to see what can be done