Add new built-in function type() that returns the name of the type of

the given value as a string. Includes test case.

src/test/res/type.lua

@@ -0,0 +1,8 @@
+print(type(5))
+print(type(3.14))
+print(type("hello"))
+print(type(function() return 1 end))
+print(type({}))
+print(type(nil))
+print(type(2 < 5))
+print(type(pairs({})))