shell.nix: split page to page.nix

modules/page.nix

@@ -0,0 +1,23 @@
+{ pkgs, config }:
+{
+  systemd.tmpfiles.rules = [ "d /tmp/neovim-page 0777 root root - -" ];
+
+  environment = {
+    systemPackages = [ pkgs.page ];
+    variables = {
+      PAGER = "page -WC -q 90000 -z 90000";
+      SYSTEMD_PAGERSECURE = "true";
+      MANPAGER = "page -t man";
+    };
+    shellAliases.page = config.environment.variables.PAGER;
+  };
+
+  programs.zsh.interactiveShellInit = ''
+    man () {
+      PROGRAM="''${@[-1]}"
+      SECTION="''${@[-2]}"
+      page -W "man://$PROGRAM''${SECTION:+($SECTION)}"
+    }
+  '';
+
+}