tailwindcss: make v4 default, move tailwindcss_3 to by-name

pkgs/by-name/ta/tailwindcss/package.nix

@@ -0,0 +1 @@
+{ tailwindcss_4 }: tailwindcss_4

pkgs/by-name/ta/tailwindcss_3/package.nix

@@ -3,7 +3,6 @@
   fetchurl,
   stdenv,
   runCommand,
-  tailwindcss,
 }:
 let
   inherit (stdenv.hostPlatform) system;
@@ -30,7 +29,7 @@ let
     .${system} or throwSystem;
 in
 stdenv.mkDerivation (finalAttrs: {
-  pname = "tailwindcss";
+  pname = "tailwindcss_3";
   version = "3.4.17";
 
   src = fetchurl {

pkgs/by-name/ta/tailwindcss_4/package.nix

@@ -5,7 +5,6 @@
   versionCheckHook,
   autoPatchelfHook,
   makeWrapper,
-  tailwindcss_4,
 }:
 let
   version = "4.0.6";

pkgs/top-level/all-packages.nix

@@ -1081,8 +1081,6 @@ with pkgs;
     ocamlPackages = ocaml-ng.ocamlPackages_4_14;
   };
 
-  tailwindcss = callPackage ../development/tools/tailwindcss { };
-
   ufolint = with python3Packages; toPythonApplication ufolint;
 
   valeronoi = qt6Packages.callPackage ../tools/misc/valeronoi { };