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/servers/mpd/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, meson, ninja, pkg-config, glib, systemd, boost, darwin
+{ lib, stdenv, fetchFromGitHub, meson, ninja, pkg-config, glib, systemd, boost, darwin
 # Inputs
 , curl, libmms, libnfs, liburing, samba
 # Archive support
@@ -171,7 +171,7 @@ let
 
       passthru.tests.nixos = nixosTests.mpd;
 
-      meta = with stdenv.lib; {
+      meta = with lib; {
         description = "A flexible, powerful daemon for playing music";
         homepage    = "https://www.musicpd.org/";
         license     = licenses.gpl2;