treewide: with stdenv.lib; in meta -> with lib;

Part of: https://github.com/NixOS/nixpkgs/issues/108938

meta = with stdenv.lib;

is a widely used pattern. We want to slowly remove
the `stdenv.lib` indirection and encourage people
to use `lib` directly. Thus let’s start with the meta
field.

This used a rewriting script to mostly automatically
replace all occurances of this pattern, and add the
`lib` argument to the package header if it doesn’t
exist yet.

The script in its current form is available at
https://cs.tvl.fyi/depot@2f807d7f141068d2d60676a89213eaa5353ca6e0/-/blob/users/Profpatsch/nixpkgs-rewriter/default.nix

pkgs/tools/networking/uget/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, intltool, openssl, curl, libnotify,
+{ lib, stdenv, fetchurl, pkgconfig, intltool, openssl, curl, libnotify,
   libappindicator-gtk3, gst_all_1, gtk3, dconf, wrapGAppsHook, aria2 ? null
 }:
 
@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
   preFixup = stdenv.lib.optionalString (aria2 != null)
                ''gappsWrapperArgs+=(--suffix PATH : "${aria2}/bin")'';
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Download manager using GTK and libcurl";
     longDescription = ''
       uGet is a VERY Powerful download manager application with a large