home/btop: Use programs.btop for automatic catppuccin goodness

modules/programs/btop.nix

@@ -1,7 +1,12 @@
 {
   flake.modules.homeManager.btop = { pkgs, ... }: {
-    home.packages = with pkgs; [
+    programs.btop = {
-      btop
+      enable = true;
-    ];
+      settings = {
+        vim_keys = true;
+        proc_tree = true;
+        proc_aggregate = true;
+      };
+    };
   };
 }