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

entries/nethack.md

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+# NetHack
+
+_Single player dungeon exploration game that runs on a wide variety of computer systems._
+
+- Home: https://www.nethack.org/, https://sourceforge.net/projects/nethack/
+- Media: https://en.wikipedia.org/wiki/NetHack
+- State: mature
+- Download: https://www.nethack.org/common/index.html
+- Keywords: role playing, roguelike
+- Code repository: https://github.com/NetHack/NetHack.git, https://github.com/Vanilla-NetHack/NetHack.git (+), https://git.code.sf.net/p/nethack/NetHack
+- Code language: C
+- Code license: Custom (Nethack General Public License)
+
+See also [NetHack Falcon's Eye](https://sourceforge.net/projects/falconseye/), a graphical modification of NetHack.
+
+## Building
+