up: init at 0.3.1

With this tool you can interactively write shell pipes with a previewed
intermediate result.

See https://github.com/akavel/up

pkgs/top-level/all-packages.nix

@@ -5884,6 +5884,8 @@ with pkgs;
 
   untrunc = callPackage ../tools/video/untrunc { };
 
+  up = callPackage ../tools/misc/up { };
+
   upx = callPackage ../tools/compression/upx { };
 
   uqmi = callPackage ../tools/networking/uqmi { };