refactor: split common/nixos.nix and -/home.nix

Split these big files into modular files that
are easier to share and read on their own.

profiles/common/home/mako.nix

@@ -0,0 +1,30 @@
+{ ... }:
+{
+  services.mako = {
+    enable = true;
+    # backgroundColor = "#2e3440";
+    # borderColor = "#88c0d0";
+    borderRadius = 15;
+    borderSize = 1;
+    defaultTimeout = 5000;
+    height = 150;
+    icons = true;
+    ignoreTimeout = true;
+    layer = "overlay";
+    maxIconSize = 64;
+    sort = "-time";
+    width = 300;
+    # font = "monospace 10";
+    extraConfig = "[urgency=low]
+    border-color=#cccccc
+    [urgency=normal]
+    border-color=#d08770
+    [urgency=high]
+    border-color=#bf616a
+    default-timeout=3000
+    [category=mpd]
+    default-timeout=2000
+    group-by=category
+    ";
+  };
+}