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/text/ocrmypdf/default.nix

@@ -7,7 +7,7 @@
 , python3
 , python3Packages
 , qpdf
-, stdenv
+, lib, stdenv
 , tesseract4
 , unpaper
 , substituteAll
@@ -80,7 +80,7 @@ buildPythonApplication rec {
 
   makeWrapperArgs = [ "--prefix PATH : ${stdenv.lib.makeBinPath [ ghostscript jbig2enc pngquant qpdf tesseract4 unpaper ]}" ];
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     homepage = "https://github.com/jbarlow83/OCRmyPDF";
     description = "Adds an OCR text layer to scanned PDF files, allowing them to be searched";
     license = licenses.gpl3;