Get simple rg example to work

lua/telescope/extensions/vimgrep.lua

@@ -0,0 +1,13 @@
+local vimgrep = {}
+
+vimgrep.parse_line = function(line)
+  local sections = vim.split(line, ":")
+
+  return {
+    filename = sections[1],
+    row = tonumber(sections[2]),
+    col = tonumber(sections[3]),
+  }
+end
+
+return vimgrep