refactor lualine resolution

- create util to determine theme just by the name
- read config from colorschemes.json

lua/lualine/themes/zenburned.lua

@@ -1,34 +1 @@
--- This file is auto-generated by shipwright.nvim
-local common_fg = "#B6B6B6"
-local inactive_bg = "#525252"
-local inactive_fg = "#F5EDE0"
-
-return {
-	normal = {
-		a = { bg = "#868686", fg = common_fg, gui = "bold" },
-		b = { bg = "#6A6A6A", fg = common_fg },
-		c = { bg = "#5C5C5C", fg = "#F0E4CF" },
-	},
-
-	insert = {
-		a = { bg = "#53738B", fg = common_fg, gui = "bold" },
-	},
-
-	command = {
-		a = { bg = "#9C6992", fg = common_fg, gui = "bold" },
-	},
-
-	visual = {
-		a = { bg = "#746956", fg = common_fg, gui = "bold" },
-	},
-
-	replace = {
-		a = { bg = "#764544", fg = common_fg, gui = "bold" },
-	},
-
-	inactive = {
-		a = { bg = inactive_bg, fg = inactive_fg, gui = "bold" },
-		b = { bg = inactive_bg, fg = inactive_fg },
-		c = { bg = inactive_bg, fg = inactive_fg },
-	},
-}
+return require("zenbones.util").get_lualine_theme("zenburned")