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/text/dos2unix/default.nix

@@ -1,4 +1,4 @@
-{stdenv, fetchurl, perl, gettext }:
+{lib, stdenv, fetchurl, perl, gettext }:
 
 stdenv.mkDerivation rec {
   pname = "dos2unix";
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ perl gettext ];
   makeFlags = [ "prefix=${placeholder "out"}" ];
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Convert text files with DOS or Mac line breaks to Unix line breaks and vice versa";
     homepage = "https://waterlan.home.xs4all.nl/dos2unix.html";
     changelog = "https://sourceforge.net/p/dos2unix/dos2unix/ci/dos2unix-${version}/tree/dos2unix/NEWS.txt?format=raw";