Add findbiome mod

mods/MISC/findbiome/README.md

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+# Minetest mod: findbiome
+
+## Description
+This is a mod to help with mod/game development for Minetest.
+It adds a command (“findbiome”) to find a biome nearby and teleport you to it
+and another command (“listbiomes”) to list biomes.
+
+Version: 1.0.1
+
+## Known limitations
+There's no guarantee you will always find the biome, even if it exists in the world.
+This can happen if the biome is very obscure or small, but usually you should be
+able to find the biome.
+
+If the biome could not be found, just move to somewhere else and try again.
+
+## Authors
+- paramat (MIT License)
+- Wuzzy (MIT License)
+
+See license.txt for license information.
+
+This mod is based on the algorithm of the "spawn" mod from Minetest Game 5.0.0.