meltbus: Fix upper eight colours of vterm

[spacefrogg]

vterm produces the colours 8–15 from the face-background of the colours 0–7. Adapt the colours to make, e.g., brightblack visible again

Fixes #765

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[gagbo]

Did you check that it works in TUI? doom-lighten and doom-darken don't do anything to their argument when it's not in GUI

[spacefrogg]

This is, how it looks like in vterm running inside a graphical emacs:

The next, when running vterm inside emacs -nw which runs inside another vterm.

So, you're right. It is only partially working. Suggestions?

[gagbo]

I guess you can compute the colors that you like from GUI, and then hardcode the value in the theme, so you dodge the doom-darken/doom-lighten call.

You can evaluate (doom-lighten (doom-color 'red) 0.3) in a scratch buffer with the theme loaded to see the value (or use SPC h F to look at the faces and have the value directly there)

[spacefrogg]

I fixed it (and some other things). First image shows vterm in GUI emacs:

Second image shows vterm in emacs -nw inside vterm: