perf(treesitter): add default setup function

autoload/SpaceVim/layers/treesitter.vim

@@ -33,6 +33,12 @@ function! SpaceVim#layers#treesitter#health() abort
   return 1
 endfunction
 
+function! SpaceVim#layers#treesitter#setup() abort
+
+  lua require('spacevim.treesitter').setup()
+
+endfunction
+
 function! SpaceVim#layers#treesitter#loadable() abort
 
   return has('nvim')

config/plugins/nvim-treesitter-0.9.1.vim

@@ -0,0 +1 @@
+call SpaceVim#layers#treesitter#setup()

lua/spacevim/treesitter.lua

@@ -0,0 +1,20 @@
+local M = {}
+
+function M.setup()
+  require('nvim-treesitter.configs').setup({
+    ensure_installed = {},
+
+    sync_install = false,
+
+    auto_install = false,
+
+    ignore_install = {},
+
+    highlight = {
+      enable = false,
+      disable = {"lua"},
+      additional_vim_regex_highlighting = false,
+    },
+  })
+end
+return M