moved the entries up one folder, added the folder to the keywords

games/zelda_mystery_of_solarus_dx.md

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+# Zelda: Mystery of Solarus DX
+
+_This quest is a free, open-source game that works with Solarus, an open-source Zelda-like 2D game engine._
+
+- Home: https://github.com/solarus-games/zsdx
+- State: mature
+- Keywords: rpg
+- Code repository: https://gitlab.com/solarus-games/zsdx.git, https://github.com/solarus-games/zsdx.git (old)
+- Code language: Lua
+- Code license: GPL-3.0
+- Code dependencies: Solarus engine
+
+See also: [Solarus engine](../framework/solarus.md).
+
+## Building
+
+- Build system: CMake