💄(buttons) new button styles ("invisible" toggled + danger)

this will be used for toggled on/off mic and camera buttons. We want
toggled-on buttons that don't look pressed as it looks a bit weird
(we'll change icons on pressed/unpressed state). And we want red buttons
for when the buttons are not pressed, so adding the "danger" variant
too.

the whole colorpalette stuff needs a bit of work to be clean but it'll
do for now

src/frontend/panda.config.ts

@@ -199,6 +199,7 @@ const config: Config = {
           text: { value: '{colors.white}' },
           subtle: { value: '{colors.red.100}' },
           'subtle-text': { value: '{colors.red.700}' },
+          ...pandaPreset.theme.tokens.colors.red,
         },
         success: {
           DEFAULT: { value: '{colors.green.700}' },