Docs for Type module (#32)

* Docs for Type module

* fix PR comments

Author: zth

src/Core__Type.resi

@@ -1,12 +1,62 @@
+/***
+Utilities for classifying the type of JavaScript values at runtime.
+*/
+
+/**
+The possible types of JavaScript values.
+*/
 type t = [#undefined | #object | #boolean | #number | #bigint | #string | #symbol | #function]
 
+/**
+`typeof(someValue)`
+
+Returns the underlying JavaScript type of any runtime value.
+
+See [`typeof`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof) on MDN.
+
+## Examples
+```rescript
+Console.log(Type.typeof("Hello")) // Logs "string" to the console.
+
+let someVariable = true
+
+switch someVariable->Type.typeof {
+| #boolean => Console.log("This is a bool, yay!")
+| _ => Console.log("Oh, not a bool sadly...")
+}
+```
+*/
 external typeof: 'a => t = "#typeof"
 
 module Classify: {
+  /***
+  Classifies JavaScript runtime values.
+  */
+
+  /**
+  An abstract type representing a JavaScript function.
+
+  See [`function`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function) on MDN.
+  */
   type function
+
+  /**
+  An abstract type representing a JavaScript object.
+
+  See [`object`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object) on MDN.
+  */
   type object
+
+  /**
+  An abstract type representing a JavaScript symbol.
+
+  See [`symbol`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol) on MDN.
+  */
   type symbol
 
+  /**
+  The type representing a classified JavaScript value.
+  */
   type t =
     | Bool(bool)
     | Null
@@ -17,5 +67,17 @@ module Classify: {
     | Function(function)
     | Symbol(symbol)
 
+  /**
+`classify(anyValue)`
+Classifies a JavaScript value.
+
+## Examples
+```rescript
+switch %raw(`null`)->Type.Classify.classify {
+| Null => Console.log("Yup, that's null.")
+| _ => Console.log("This doesn't actually appear to be null...")
+}
+```
+*/
   let classify: 'a => t
 }