added diagflow

lua/plugins/diagflow.lua

@@ -0,0 +1,9 @@
+return {
+  'dgagn/diagflow.nvim',
+  -- event = 'LspAttach', This is what I use personnally and it works great
+  opts = {
+    scope = 'line',
+    show_sign = false,
+    show_borders = true,
+  },
+}