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/gif-for-cli/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, python3Packages, ffmpeg, zlib, libjpeg }:
+{ lib, stdenv, fetchFromGitHub, python3Packages, ffmpeg, zlib, libjpeg }:
 
 python3Packages.buildPythonApplication {
   pname = "gif-for-cli";
@@ -15,7 +15,7 @@ python3Packages.buildPythonApplication {
   buildInputs = [ zlib libjpeg ];
   propagatedBuildInputs = with python3Packages; [ ffmpeg pillow requests x256 ];
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Render gifs as ASCII art in your cli";
     longDescription = "Takes in a GIF, short video, or a query to the Tenor GIF API and converts it to animated ASCII art.";
     homepage = "https://github.com/google/gif-for-cli";