add(/wiki/engines/?): stubbed per-engine articles

Note: Prog.-Lang. section does not list the used shading language.

Author: Longor1996

content/wiki/engines/godot.md

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++++
+title = "Godot"
+description = "A free and open-source cross-platform game engine for making 2D and 3D games..."
+alias = "/wiki/godot"
+[taxonomies]
+categories = ["engines"]
+tags = ["engine"]
++++
+
+{{ stub_notice() }}
+
+## Programming Languages
+
+- `C++`
+- `GDScript`
+- `C#`
+
+## References
+
+- [Godot Engine: Official Website](https://godotengine.org/)

content/wiki/engines/index.md

@@ -1,6 +1,8 @@
 +++
 title = "Engines"
 description = "Using an existing engine or writing a new one is a hard question; this article might help."
+[taxonomies]
+categories = ["engines"]
 +++
 
 {% quote(author="[Wikipedia](https://en.wikipedia.org/wiki/Game_engine)") %}

content/wiki/engines/unity.md

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+title = "Unity3d Engine"
+description = "Unity Real-Time Development Platform/Engine for 3D, 2D, VR & AR ..."
+alias = "/wiki/unity3d"
+[taxonomies]
+categories = ["engines"]
+tags = ["engine"]
++++
+
+{{ stub_notice() }}
+
+## Programming Languages
+
+- `C#`: Version 9 / .NET Standard.
+
+## References
+
+- [Unity Engine: Official Website](https://unity.com/)

content/wiki/engines/unreal.md

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+title = "Unreal Engine"
+description = "Unreal Engine is a 3D computer graphics game engine developed by Epic Games..."
+alias = "/wiki/unreal"
+[taxonomies]
+categories = ["engines"]
+tags = ["engine"]
++++
+
+{{ stub_notice() }}
+
+## Programming Languages
+
+- `C++`: Custom dialect with *a lot* of macros.
+- `Blueprints`
+- `Verse`
+
+## References
+
+- [Unreal Engine: Official Website](https://www.unrealengine.com/)