Get theme color/var value

[Flowseal]

Is your feature request related to a problem? Please describe.
It's unavaliable to get theme color/var value

Describe the solution you'd like

Method to get color/var value:
dpg.get_theme_var/color with (target, category, optional: item)

[hoffstadt]

This is added in the next release. get_item_configuration(...) will show this.

[skywolf829]

Still a little unclear how to get a theme color. For example I'm loading some icon PNGs and I want to set the non-transparent pixels to be the same color as the theme text. I'm just using the default theme and haven't changed anything, but I'd the PNG color to change if we change the theme colors later.