Implement MongoQueryInterpreter

[stalniy]

• this interpreter should be part of @ucast/mongo
• it should support the same operators as js interpreter from @ucast/js
• it should allow to pass custom operators
• it should use createInterpreter function from @ucast/core to create interpret function
• the return value of interpret function is an object, mongo query

This may be useful if we want to convert custom mongo query operators into regular mongo query or if we need to convert custom parser ast to mongo query

[hrandika]

any update on this?