Initial release

Evaluator with below spec,

• Each JSON will either be an operator or a data.
• The JSON is an operator, if the first key is one of the configured strings.
• Each operator will have to be resolved to a function with the value of it will be passed as a parameter for the function.
• When a JSON is not an operator, it represents a normal JSON.
• The execution has to happen in a nested manner. For example, if an operator has another operator as a parameter, the inner one needs to be executed first.
• The DSL has to be converted to the code first and then the execution has to happen on an explicit call.
• The response of the DSL will be the execution result of the JSON.
• When the DSL is a list and if JSON is an operator, the result will be a list with the evaluated results.
• When the JSON is not an operator, it will be returned as is.