fix(plugins): protect ensure_installed table from community packs

plugins/treesitter.lua

@@ -1,6 +1,10 @@
 return {
   "nvim-treesitter/nvim-treesitter",
-  opts = {
-    -- ensure_installed = { "lua" },
-  },
+  opts = function(_, opts)
+    -- add more things to the ensure_installed table protecting against community packs modifying it
+    if not opts.ensure_installed then opts.ensure_installed = {} end
+    require("astronvim.utils").list_insert_unique(opts.ensure_installed, {
+      -- "lua"
+    })
+  end,
 }