refactor(plugins): ensure_installed tables now extend by default

lua/plugins/treesitter.lua

@@ -5,12 +5,11 @@ if true then return {} end -- WARN: REMOVE THIS LINE TO ACTIVATE THIS FILE
 ---@type LazySpec
 return {
   "nvim-treesitter/nvim-treesitter",
-  opts = function(_, opts)
-    -- add more things to the ensure_installed table protecting against community packs modifying it
-    opts.ensure_installed = require("astrocore").list_insert_unique(opts.ensure_installed, {
+  opts = {
+    ensure_installed = {
       "lua",
       "vim",
       -- add more arguments for adding more treesitter parsers
-    })
-  end,
+    },
+  },
 }