convert rosebones to new specs generator

lua/zenflesh/init.lua

@@ -1,10 +1,5 @@
 local specs = require "zenflesh.specs"
 local p = require "zenflesh.palette"
+local config = require("zenbones.util").resolve_config "zenflesh"
 
-return specs.generate(p, {
-	darkness = vim.g.zenflesh_darkness,
-	comment_gui = vim.g.zenflesh_italic_comments ~= false and "italic" or "NONE",
-	lighten_noncurrent_window = vim.g.zenflesh_lighten_noncurrent_window,
-	solid_vert_split = vim.g.zenflesh_solid_vert_split,
-})
--- vi:nowrap
+return specs.generate(p, config)