[CR-10] NPCs and Quests logic by scripts

[congcoi123]

Scripts could be used for implementing quests and NPCs logic. In this case, the running command can be considered as.

$ java -jar server.jar configuration=configuration 
.xml scripts=/scripts

Prerequisites

• Script handlers need to be implemented by annotations mechanisms
• Each script must have independent handler class, it distinguishes others by script file's path

[congcoi123]

The script files could be done by using .xml format.
It is not so flexible but still feasible.
Remembers to implement mechanisms allow refreshing and saving scripts data into cache frequently.