init: Asynchronously load filetype and syntax

lots of improvement for startup time

Co-authored-by: Vhyrro <vhyrro@gmail.com>

lua/options.lua

@@ -1,6 +1,13 @@
 local opt = vim.opt
 local g = vim.g
 
+-- Turn these off at startup, will be enabled later just before loading the theme
+vim.cmd([[
+    syntax off
+    filetype off
+    filetype plugin indent off
+]])
+
 opt.ruler = false
 opt.hidden = true
 opt.ignorecase = true

lua/theme.lua

@@ -3,6 +3,13 @@ vim.g.nvchad_theme = "onedark"
 local present, base16 = pcall(require, "base16")
 
 if present then
+    -- enabled these options, was disabled in options.lua
+    vim.cmd([[
+        syntax on
+        filetype on
+        filetype plugin indent on
+    ]])
+
     base16(base16.themes["onedark"], true)
     require "highlights"
     return true