Add section about Luau inability to infer param props and how to fix

Author: fewkz

README.md

@@ -185,3 +185,14 @@ rojo serve testing.project.json
 ```
 
 For more help, check out [the Rojo documentation](https://rojo.space/docs).
+
+## Issues
+
+If you run into issues where, you're creating an element like:
+`TextButton({ onActivated = function(rbx) end })`, and Luau is unable to infer
+`rbx` as `TextButton`, you may want to set the following parameters to `True`:
+https://github.com/fewkz/froact/blob/0b749d9a2cfb90eb03780e29f2bcbb7e587f8628/generate.py#L26-L29
+This will fix Luau not being able to infer the parameter correctly, but may
+drastically increase the size of `froactful.lua`, the added convenience is
+definitely worth it however. The distributed version of froact has these set to
+`False` by default.