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/audio/bpm-tools/default.nix

@@ -1,5 +1,5 @@
 {
-  stdenv,
+  lib, stdenv,
   fetchurl,
   gnuplot,
   sox,
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
     wrapProgram $out/bin/bpm-graph --prefix PATH : "${path}"
   '';
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     homepage = "http://www.pogo.org.uk/~mark/bpm-tools/";
     description = "Automatically calculate BPM (tempo) of music files";
     license = licenses.gpl2;