refactoring to use config options from lua module

lua/lib/colors.lua

@@ -1,24 +1,7 @@
+local colors = require 'lib/config'.colors
+
 local cmd = vim.api.nvim_command
 
-local function get(var, fallback)
-    if vim.api.nvim_call_function('exists', { var }) == 1 then
-        return vim.api.nvim_get_var(var)
-    else
-        return fallback
-    end
-end
-
-local colors = {
-    red = get('terminal_color_1', 'Red'),
-    green = get('terminal_color_2', 'Green'),
-    yellow = get('terminal_color_3', 'Yellow'),
-    blue = get('terminal_color_4', 'Blue'),
-    purple = get('terminal_color_5', 'Purple'),
-    cyan = get('terminal_color_6', 'Cyan'),
-    orange = get('terminal_color_11', 'Orange'),
-    dark_red = get('terminal_color_9', 'DarkRed'),
-}
-
 local HIGHLIGHTS = {
     Symlink = { gui = 'bold', fg = colors.cyan },
     FolderName = { gui = 'bold', fg = colors.blue },