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/development/perl-modules/MNI/default.nix

@@ -1,4 +1,4 @@
-{ fetchFromGitHub, buildPerlPackage, stdenv }:
+{ fetchFromGitHub, buildPerlPackage, lib, stdenv }:
 
 buildPerlPackage {
   pname = "MNI-Perllib";
@@ -15,7 +15,7 @@ buildPerlPackage {
 
   doCheck = false;  # TODO: almost all tests fail ... is this a real problem?
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     homepage = "https://github.com/BIC-MNI/mni-perllib";
     license = with licenses; [ artistic1 gpl1Plus ];
     maintainers = with maintainers; [ bcdarwin ];