make cmp popups with grey bckg and no borders

lua/plugins/cmp.lua

@@ -58,8 +58,13 @@ cmp.setup({
         end,
     },
     window = {
-        completion = cmp.config.window.bordered(),
+        completion = {
-        documentation = cmp.config.window.bordered(),
+            border = nil,
+        },
+        documentation = {
+            border = nil,
+            max_height = 2000,
+        }
     },
     completion = {
         autocomplete = false,