switch over hopper fully (+ minor refactoring)

nix/systemProfiles/programs/zsh.nix

@@ -0,0 +1,20 @@
+{
+  # enable zsh autocompletion for system packages (systemd, etc)
+  environment.pathsToLink = ["/share/zsh"];
+
+  programs = {
+    less = {
+      enable = true;
+      envVariables.LESS = "--mouse";
+    };
+
+    zsh = {
+      enable = true;
+      autosuggestions.enable = true;
+      syntaxHighlighting = {
+        enable = true;
+        highlighters = ["main" "brackets" "pattern"];
+      };
+    };
+  };
+}