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/misc/ffsend/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitLab, rustPlatform, cmake, pkgconfig, openssl
+{ lib, stdenv, fetchFromGitLab, rustPlatform, cmake, pkgconfig, openssl
 , darwin, installShellFiles
 
 , x11Support ? stdenv.isLinux || stdenv.hostPlatform.isBSD
@@ -45,7 +45,7 @@ buildRustPackage rec {
   '';
   # There's also .elv and .ps1 completion files but I don't know where to install those
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Easily and securely share files from the command line. A fully featured Firefox Send client";
     longDescription = ''
       Easily and securely share files and directories from the command line through a safe, private