feat(contains): add some basic examples

Author: nik-rev

14_contains/README.md

@@ -1,3 +1,12 @@
 # Exercise 14 - contains
 
 Write a function that searches for a value in a nested object. It returns true if the object contains that value.
+
+Objects are compared by reference.
+
+Examples:
+
+```javascript
+contains({ foo: "foo" }, "bar") // true
+contains({ foo: { bar: "bar" } }, "bar") // true
+```