Added FAQ doc

Author: mpeyper

docs/reference/faq.md

@@ -0,0 +1,15 @@
+---
+name: FAQ
+menu: Reference
+route: '/reference/faq'
+---
+
+# Frequently Asked Questions
+
+- [Why I need to use `result.current` instead of just `result`?](/reference/faq#why-i-need-to-use-resultcurrent-instead-of-just-result)
+
+---
+
+### Why I need to use `result.current` instead of just `result`?
+
+The "ref-like" representation of the hook's result allows the value to be updated when the hook gets rerendered, whether that be from calling `rerender`, calling a callback returned from the hook, or an asynchronous action triggered by executing the hook. Without `current` the library would have to provide some way of requesting the updated values for assertions.