Get simple rg example to work

lua/telescope/previewers.lua

@@ -0,0 +1,16 @@
+local previewers = {}
+
+local Previewer = {}
+Previewer.__index = Previewer
+
+function Previewer:new(fn)
+  return setmetatable({
+    fn = fn,
+  }, Previewer)
+end
+
+previewers.new = function(...)
+  return Previewer:new(...)
+end
+
+return previewers