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/python-modules/cppheaderparser/default.nix

@@ -1,7 +1,7 @@
 { buildPythonPackage
 , fetchPypi
 , ply
-, stdenv
+, lib, stdenv
 }:
 
 buildPythonPackage rec {
@@ -17,7 +17,7 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "CppHeaderParser" ];
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Parse C++ header files using ply.lex to generate navigable class tree representing the class structure";
     homepage = "https://sourceforge.net/projects/cppheaderparser/";
     license = licenses.bsdOriginal;