perf: Home-manager to module

feat: Optionise config

modules/user/btop.nix

@@ -0,0 +1,15 @@
+{ pkgs, ... }: {
+  programs.btop = {
+    enable = true;
+    package = pkgs.btop.override { cudaSupport = true; };
+    settings = {
+      shown_boxes = "proc cpu gpu0 mem net";
+      # color_theme = "TTY";
+      update_ms = 1000;
+      cpu_single_graph = true;
+      only_physical = false;
+      net_auto = false;
+      net_iface = "eno1";
+    };
+  };
+}