Add support for non-interactive bootstrapping (#2528)

https://github.com/NvChad/NvChad/pull/2528#issuecomment-1834599074

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Co-authored-by: Sidhanth Rathod <siduck@tutanota.com>

lua/core/bootstrap.lua

@@ -40,7 +40,7 @@ M.gen_chadrc_template = function()
   local path = fn.stdpath "config" .. "/lua/custom"
 
   if fn.isdirectory(path) ~= 1 then
-    local input = fn.input "Do you want to install example custom config? (y/N): "
+    local input = vim.env.NVCHAD_EXAMPLE_CONFIG or fn.input "Do you want to install example custom config? (y/N): "
 
     if input:lower() == "y" then
       M.echo "Cloning example custom config repo..."