Add assertion for maze constraints and limit _random_floor_cell attempts#515

Gjorgji-Noveski wants to merge 1 commit intoopen-thought:mainopen-thought/reasoning-gym:mainfrom

Gjorgji-Noveski:fix/maze-path-cell-pickingGjorgji-Noveski/reasoning-gym:fix/maze-path-cell-pickingCopy head branch name to clipboard