Updated GDScript code from dynamic type to static type

[SriramAnanth2912]

Refactored GDScript code for full static typing compliance

In the docs, the GDScript code is dynamically type casted as var foo = 12. I did static type casting for the GDScript code as var foo : int = 12.

Completely refactored the code as mentioned above and also added necessary statements explaining the static types used.