Update to (somewhat?) dendritic pattern

Heavily inspired by https://github.com/Doc-Steve/dendritic-design-with-flake-parts.

> Atomic commits? Never heard of them!

modules/programs/browser.nix

@@ -0,0 +1,14 @@
+{ inputs, ... }: {
+  flake-file.inputs = {
+    zen-browser = {
+      url = "github:youwen5/zen-browser-flake";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  flake.modules.homeManager.browser = { pkgs, ... }: {
+    home.packages = [
+      inputs.zen-browser.packages.${pkgs.stdenv.hostPlatform.system}.default
+    ];
+  };
+}