Improve Expression with adding type checking functions

[cosmicshuai]

fixes: #3466

1. Remove Array prebuilt-function. You can use createArray funtions.
2. Type Checking prebuilt functions:
   isString, isInteger (*), isFloat, isArray, isObject, isDateTime (**), isBoolean
   Notes:

• In JavaScript, when you call isInteger(1.0), it will true, so isFloat(1.0) will be false.
  ** isDateTime can will only return true when a ISO TimeStamp string is parsed