refactor: create an emacs wrapper

Why this is being done is just to include texliveTeTeX in my Emacs package. This is done because I want to be able to export PDFs without ever needing to remember to make a new devShell just for a document.

package/default.nix

@@ -1,5 +1,6 @@
-{ emacsWithPackagesFromUsePackage, emacs29-pgtk, python3, texliveTeTeX }:
-emacsWithPackagesFromUsePackage {
+{ symlinkJoin, emacsWithPackagesFromUsePackage, emacs29-pgtk, python3, texliveFull, makeWrapper, lib }:
+let
+  emacs-linux = emacsWithPackagesFromUsePackage {
   package = emacs29-pgtk;
     config = ./config.org;
     defaultInitFile = true;
@@ -43,7 +44,17 @@ emacsWithPackagesFromUsePackage {
       }) ++ [
         e.treesit-grammars.with-all-grammars
         python3
-      texliveTeTeX
       ];
     override = _: prev: { use-package = prev.emacs; };
+  };
+in
+symlinkJoin {
+  name = "emacs";
+  paths = [ texliveFull emacs-linux ];
+  buildInputs = [ makeWrapper ];
+  postBuild = ''
+    mkdir -p $out/bin
+    wrapProgram $out/bin/emacs \
+      --set PATH ${lib.makeBinPath [ texliveFull ]}:$PATH
+  '';
 }