Add wilson with solution helper method

[luciaquirke]

• Add a helper method that generates a maze using Wilson's algorithm, and a solution to it using A*. The start and ending points of the path are chosen randomly.
• Update the name of the method to get the solution because I found it confusing - open to anything less wordy

I couldn't use this method's outputs with PlotMaze which made me realise we have a bunch of similar but incompatible types that are keeping me from using the solved maze with the PlotMaze.add_true_path. I think we may need to merge CoordTup and Coord, and replace CoordArray with list(CoordTup). Or at least be consistent with how we do it. Not necessary for this PR though.

[luciaquirke]

Bump :)

[mivanit]

I think it's cleaner to have a single method to take the name of a generator and a grid shape, for when we add more generation algos. I've got an implementation of this in #177

def get_maze_with_solution(gen_name: str, grid_shape: Coord) -> SolvedMaze:
    maze: LatticeMaze = GENERATORS_MAP[gen_name](grid_shape)
    solution: CoordArray = np.array(maze.generate_random_path())
    return SolvedMaze.from_lattice_maze(lattice_maze=maze, solution=solution)

do you think its a good idea to add that to this PR? either #177 or #162 contains code to run through all generators and test them, which I think is also cleaner than testing them individually.