Implement a scoring system

[Arsenic-ATG]

Current status

The game doesn't count score in any way.

Desired behaviour

though the including the modern scoring system should be ideal, I think implementing the basic scoring system first is a good start.

Here is how the original scoring system count score (source : https://tetris.wiki/Scoring )

Action	Points
Single-line perfect clear	800 × level
Double-line perfect clear	1200 × level
Triple-line perfect clear	1800 × level
Tetris perfect clear	2000 × level
Back-to-back Tetris perfect clear	3200 × level

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