Constant GRID_PLAYGROUND

pub const GRID_PLAYGROUND: Grid;

A Grid with many smaller paths to practice maneuvering

use core_pb::grid::standard_grid::GRID_PLAYGROUND;
use core_pb::grid::Grid;
use core_pb::grid::computed_grid::ComputedGrid;

let grid: Grid = GRID_PLAYGROUND;
let computed_grid: ComputedGrid = grid.try_into().unwrap();