wip: rely on vim background for setting theme

lua/rose-pine/palette.lua

@@ -1,6 +1,4 @@
-local palette = {}
-
-palette = {
+local variants = {
 	main = {
 		base = '#191724',
 		surface = '#1f1d2e',
@@ -57,6 +55,14 @@ palette = {
 	},
 }
 
+local palette = {}
+
+if vim.o.background == 'light' then
+	palette = variants.dawn
+else
+	palette = variants[(vim.g.rose_pine_variant == 'moon' and 'moon') or 'main']
+end
+
 vim.tbl_deep_extend('force', palette, { none = 'NONE' })
 
 return palette