refactor(nix): allow for host specific homebrew setups

nix/darwin/default.nix

@@ -1,7 +1,7 @@
 { pkgs, config, ... }:
 
 {
-  homebrew = import ./homebrew.nix // { enable = true; };
+  homebrew = import ./homebrew-common.nix;
 
   # Auto upgrade nix package and the daemon service.
   services.nix-daemon.enable = true;

nix/darwin/homebrew-common.nix

@@ -0,0 +1,9 @@
+{
+  enable = true;
+  # TODO: Activate after migration is complete
+  # onActivation.cleanup = "uninstall";
+  taps = [ ];
+  brews = [ ];
+  casks = [ "raycast" ];
+  masApps = { };
+}

nix/hosts/mac-mini/configuration.nix

@@ -9,4 +9,6 @@
     name = "kogakure";
     home = "/Users/kogakure";
   };
+
+  homebrew = import ./homebrew.nix;
 }

nix/hosts/mac-mini/homebrew.nix

@@ -3,6 +3,8 @@
   # onActivation.cleanup = "uninstall";
   taps = [ ];
   brews = [ ];
-  casks = [ "raycast" ];
+  casks = [
+    "webtorrent"
+  ];
   masApps = { };
 }