Allows you to set seed of the vault made with vault crystal
Use /the_vault crystal setSeed <seed> to set the seed, if <seed> is empty, the vault will have random seed.
Keep in mind that you will need to set the same seed and lvl (with /the_vault crystal setLevel <lvl>) to generate the same vault.
This mod also adds button to the vault end screen that allows you to copy the vault seed (can be disabled in config).
