renamed games folder to entries folder (also contained frameworks, libraries, ...) and added to the backlog

entries/sonic_robo_blast_2.md

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+# Sonic Robo Blast 2
+
+_Clone of Sonic the Hedgehog._
+
+- Home: https://www.srb2.org/
+- Media: https://en.wikipedia.org/wiki/List_of_Sonic_the_Hedgehog_video_games
+- State: mature
+- Download: https://www.srb2.org/download/
+- Platform: Windows, Linux, macOS
+- Keywords: platform, clone, inspired by Sonic the Hedgehog, skill
+- Code repository: https://github.com/STJr/SRB2.git
+- Code language: C, C++
+- Code license: GPL-2.0
+
+## Building
+
+- Build system: CMake
+- Build instructions: http://wiki.srb2.org/wiki/Source_code_compiling