feat(bigfile): add bigfile module

lua/lazyvim/plugins/extras/editor/bigfile.lua

@@ -0,0 +1,19 @@
+return {
+  "LunarVim/bigfile.nvim",
+  event = { "BufReadPre", "BufNewFile" },
+  opts = {
+    pattern = function(bufnr, filesize_mib)
+      if filesize_mib >= 2 then
+        return true
+      end
+      -- you can't use `nvim_buf_line_count` because this runs on BufReadPre
+      local file_contents = vim.fn.readfile(vim.api.nvim_buf_get_name(bufnr))
+      local file_length = #file_contents
+      if file_length > 5000 then
+        return true
+      end
+
+      return false
+    end,
+  },
+}