Implement chunk-like system for space

[KennethGomez]

What this system aims is to provide a performant way to iterate through stars for hovering animations;

The idea is the following:

• Create a grid of chunks of 64 x 64 pixels.
• Assign stars to a chunk depending on its position grid[(star.x / 64) | 0][(star.y / 64) | 0] .
• For star finding algorithm look on the chunk on which the pointer is on grid[(p.x / 64) | 0][(p.y / 64) | 0] and look on nearby chunks depending on if the look-up distance is outside of the main chunk bounds.