Implement advanced scoring system

[Arsenic-ATG]

Current status

After #6 ,the game calculates score based on conventional tetris syle ( 100*level) per line clear

Desired behaviour

though the including the modern scoring system should be ideal, I think implementing the basic scoring system first is a good start. To make the game more exciting, the game should reward score for even risky moves like hard-drop and T-spings

currently there is no levelling system so value of level would always be one for the time being