lhs2tex: Add to top-level

the `lhs2tex` tool is a “commonly” used tool in academia to typeset
certain papers, and it would be prudent to have it available outside the
`haskellPackages` namespace, and also made available on the caches.

Also added to release-haskell.nix, and made myself the maintainer.

pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml

@@ -289,6 +289,7 @@ package-maintainers:
     - candid
     - leb128-cereal
     - tasty-expected-failure
+    - lhs2tex
   pacien:
     - ldgallery-compiler
   peti:

pkgs/development/haskell-modules/hackage-packages.nix

@@ -169570,6 +169570,7 @@ self: {
        ];
        description = "Preprocessor for typesetting Haskell sources with LaTeX";
        license = "GPL";
+       maintainers = with lib.maintainers; [ nomeata ];
      }) {};
 
   "lhslatex" = callPackage

pkgs/top-level/all-packages.nix

@@ -13021,6 +13021,8 @@ with pkgs;
 
   stylish-cabal = haskell.lib.compose.justStaticExecutables haskellPackages.stylish-cabal;
 
+  lhs2tex = haskellPackages.lhs2tex;
+
   all-cabal-hashes = callPackage ../data/misc/hackage { };
 
   purescript = callPackage ../development/compilers/purescript/purescript { };

pkgs/top-level/release-haskell.nix

@@ -203,6 +203,7 @@ let
         koka
         krank
         lambdabot
+        lhs2tex
         madlang
         matterhorn
         mueval