Port the wild growing plants from Legacy code.

[GoodG1448]

We used to have xander/broc/mutfruit/ferrocactus back in the old code. I found the file looking around the old code:

https://github.com/BadDeathclaw/bad-deathclaw/blob/master/code/game/objects/structures/wasteplants.dm

Found the sprites as well:

https://github.com/BadDeathclaw/bad-deathclaw/blob/master/icons/obj/Plants.dmi

EDIT: We seem to already have updated sprites in this repository. Looks taken from Outcasts.

https://github.com/BadDeathclaw/TG-Claw/blob/master/icons/fallout/flora/flora.dmi

[UndeadNappist]

old codebase rng genned plants on the map https://github.com/BadDeathclaw/bad-deathclaw/blob/64ba57582479059dd91819603d9ccba356842ca8/code/game/objects/structures/flora.dm