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

entries/dune_legacy.md

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+# Dune Legacy
+
+_Updated clone of Westwood Studios' Dune2 which uses data files from the original game._
+
+- Home: http://dunelegacy.sourceforge.net/website/, https://sourceforge.net/projects/dunelegacy/
+- State: mature
+- Download: http://dunelegacy.sourceforge.net/website/downloads.html, https://sourceforge.net/projects/dunelegacy/files
+- Keywords: strategy, inspired by Dune 2, remake, requires original content
+- Code repository: https://git.code.sf.net/p/dunelegacy/code
+- Code language: C++
+- Code license: GPL-2.0
+
+## Building
+