Reorganize site to make room for documenting the other built-in modules.

doc/site/modules/core/object.markdown

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+^title Object Class
+
+## Static Methods
+
+### **same**(obj1, obj2)
+
+Returns `true` if *obj1* and *obj2* are the same. For [value
+types](../values.html), this returns `true` if the objects have equivalent
+state. In other words, numbers, strings, booleans, and ranges compare by value.
+
+For all other objects, this returns `true` only if *obj1* and *obj2* refer to
+the exact same object in memory.
+
+This is similar to the built in `==` operator in Object except that this cannot
+be overriden. It allows you to reliably access the built-in equality semantics
+even on user-defined classes.
+
+## Methods
+
+### **!** operator
+
+Returns `false`, since most objects are considered [true][].
+
+[true]: control-flow.html#truth
+
+### **==**(other) and **!=**(other) operators
+
+Compares two objects using built-in equality. This compares [value
+types](../values.html) by value, and all other objects are compared by
+identity—two objects are equal only if they are the exact same object.
+
+### **is**(class) operator
+
+Returns `true` if this object's class or one of its superclasses is `class`.
+
+    :::wren
+    System.print(123 is Num)     //> true
+    System.print("s" is Num)     //> false
+    System.print(null is String) //> false
+    System.print([] is List)     //> true
+    System.print([] is Sequence) //> true
+
+It is a runtime error if `class` is not a [Class][].
+
+### **toString**
+
+A default string representation of the object.
+
+### **type**
+
+The [Class][] of the object.
+
+[class]: class.html