Add simplified version of 'craftguide' mod, named 'mtg_craftguide' (#…

…2396)

mods/mtg_craftguide/README.md

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+Minetest Game mod: mtg_craftguide
+=================================
+
+Adds a "Recipes" tab to the inventory. Click an item to see it's recipes.
+Click again to show usages.
+
+Based on [craftguide](https://github.com/minetest-mods/craftguide).
+
+Authors of media
+----------------
+
+paramat (CC BY-SA 3.0):
+
+* craftguide_clear_icon.png
+* craftguide_next_icon.png
+* craftguide_prev_icon.png
+* craftguide_search_icon.png
+
+Neuromancer (CC BY-SA 3.0):
+
+* craftguide_furnace.png
+
+Wuzzy (CC BY-SA 3.0):
+
+* craftguide_shapeless.png