spMeTeR revival

This is a revival by ilikecats, original code is here: https://codeberg.org/crabycowman123/mtr-no-history

spMeTeR was a game for the 2021 Minetest Game Jam, but it is being changed to be better. It's a fairly good game concept, but could be better.

The code is licensed under the GNU AGPL v3-or-later. The media is licensed under the CC-BY-SA 4.0.

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Here is the old description:

This is a game about fighting monsters, collecting resources and accumulating money.

This game is very unfinished. It was made for the 2021 Minetest Game Jam.
features:
	* completely handcrafted map
	* 1 monster type
	* shop
	* melee weapons
	* throwable weapons
	* random crashes