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

entries/iceball.md

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+# Iceball
+
+_Remake of Ace of Spades._
+
+- Home: https://web.archive.org/web/20161106081943/http://iceball.build/
+- State: inactive since 2017
+- Keywords: remake, inspired by Ace of Spades, open content
+- Code repository: https://github.com/iamgreaser/iceball.git
+- Code language: C, Lua
+- Code license: GPL-3.0
+- Assets license: CC-BY-SA
+
+## Building
+
+- Build system: CMake