✨ Add support for Polymorph (#84)

assets/polymorph/LICENSE

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+Copyright (C) 2020-2022 Illusive Soulworks
+
+Polymorph is free software: you can redistribute it and/or modify it
+under the terms of the GNU Lesser General Public License as published
+by the Free Software Foundation, either version 3 of the License, or
+any later version.
+
+Polymorph is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with Polymorph.  If not, see <https://www.gnu.org/licenses/>.
+
+==============================================
+
+This program redistributes the SpectreLib project.
+
+Copyright (C) 2022 Illusive Soulworks
+
+SpectreLib is licensed under the terms of version 2.1 of the GNU
+Lesser General Public License as published by the Free Software
+Foundation and can be found here:
+
+Source: https://github.com/illusivesoulworks/spectrelib

assets/polymorph/README.md

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+# Polymorph
+[![](http://cf.way2muchnoise.eu/versions/polymorph.svg)](https://www.curseforge.com/minecraft/mc-mods/polymorph)
+[![](http://cf.way2muchnoise.eu/short_polymorph_downloads.svg)](https://www.curseforge.com/minecraft/mc-mods/polymorph/files)
+[![License: LGPL v3](https://img.shields.io/badge/License-LGPL%20v3-blue.svg?&style=flat-square)](https://www.gnu.org/licenses/lgpl-3.0)
+[![ko-fi](https://img.shields.io/badge/Support%20Me-Ko--fi-%23FF5E5B?style=flat-square)](https://ko-fi.com/C0C1NL4O)
+
+Polymorph is a mod that solves recipe conflicts by letting players choose between all potential
+outputs shared by the same ingredients.
+
+With a sufficiently large amount of mods, recipe conflicts are a common occurrence and the
+responsibility for resolving these usually falls on the user or modpack developer, using datapacks
+or other tools to ensure that each recipe is unique.
+
+Polymorph offers an alternative solution, allowing all possible crafting and smelting recipes to
+co-exist regardless of conflicts.
+
+![](https://i.postimg.cc/prDcRzJ8/logo-final.png)
+
+## Features
+
+### Crafting
+
+![](https://i.ibb.co/TkWswkG/polymorph.gif)
+
+When a group of ingredients matches more than one recipe, a button will appear above the output
+slot. Pushing this button will show a list of all possible results and selecting one will change the
+crafting output to match. Polymorph will also remember the last selection as long as the ingredients
+don't change, so repeated crafting actions are possible on the same selection.
+
+### Smelting
+
+![](https://i.ibb.co/QX9MNYM/polymorph-furnacedemo.gif)
+
+When a valid input matches more than one output, a button will appear above the output slot. Pushing
+this button will show a list of all possible results with the currently selected result highlighted
+in green. Selecting one of the listed results will change the smelting output to match. This
+selection will be saved to the block itself and persist across world loading and unloading.
+
+### Commands
+
+To assist identifying potential conflicts, there's a command `/polymorph conflicts` that will try to
+identify recipes that conflict with each other and outputs a list of them to your logs folder.
+
+## Downloads
+
+**CurseForge**
+- [Polymorph for Forge](https://www.curseforge.com/minecraft/mc-mods/polymorph/files)
+- [Polymorph for Fabric](https://www.curseforge.com/minecraft/mc-mods/polymorph-fabric/files)
+
+## Support
+
+Please report all bugs, issues, and feature requests to the
+[issue tracker](https://github.com/illusivesoulworks/polymorph/issues).
+
+For non-technical support and questions, join the developer's [Discord](https://discord.gg/JWgrdwt).
+
+## License
+
+All source code and assets are licensed under LGPL 3.0.
+
+## Donations
+
+Donations to the developer can be sent through [Ko-fi](https://ko-fi.com/C0C1NL4O).