use lua api for packersync wrapper

lua/core/init.lua

@@ -42,6 +42,13 @@ autocmd("FileType", {
 -- wrap the PackerSync command to warn people before using it in NvChadSnapshots
 autocmd("VimEnter", {
   callback = function()
-    vim.cmd "command! -nargs=* -complete=customlist,v:lua.require'packer'.plugin_complete PackerSync lua require('plugins') require('core.utils').packer_sync(<f-args>)"
+    vim.api.nvim_create_user_command("PackerSync", function(opts)
+      require "plugins"
+      require("core.utils").packer_sync(opts.fargs)
+    end, {
+      bang = true,
+      nargs = "*",
+      complete = require("packer").plugin_complete,
+    })
   end,
 })