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

games/rigs_of_rods.md

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+# Rigs of Rods
+
+_3D simulator game where you can drive, fly and sail various vehicles._
+
+- Home: https://www.rigsofrods.org/, https://sourceforge.net/projects/rigsofrods/, https://github.com/RigsOfRods
+- State: mature 
+- Download: (see homepage)
+- Platform: Windows
+- Keywords: simulation, drive
+- Code repository: https://github.com/RigsOfRods/rigs-of-rods.git
+- Code language: C++
+- Code license: GPL-3.0
+
+## Building
+
+- Build system: CMake