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/ocaml-modules/herelib/default.nix

@@ -1,4 +1,4 @@
-{stdenv, buildOcaml, fetchurl}:
+{lib, stdenv, buildOcaml, fetchurl}:
 
 buildOcaml rec {
   version = "112.35.00";
@@ -11,7 +11,7 @@ buildOcaml rec {
     sha256 = "03rrlpjmnd8d1rzzmd112355m7a5bwn3vf90xkbc6gkxlad9cxbs";
   };
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     homepage = "https://github.com/janestreet/herelib";
     description = "Syntax extension for inserting the current location";
     license = stdenv.lib.licenses.asl20;