feat!: dynamically create hosts

This commit completely restructures the flake. Hosts are now seperate
from profile configuration files in hosts/[system]. Nixos and Darwin
configurations will be built when present in the respective folders in hosts/

profiles/server/nixos/mpd.nix

@@ -0,0 +1,51 @@
+{ pkgs, lib, config, ... }:
+{
+  config = lib.mkIf config.swarselsystems.server.mpd {
+    users = {
+      groups = {
+        mpd = { };
+      };
+
+      users = {
+        mpd = {
+          isSystemUser = true;
+          group = "mpd";
+          extraGroups = [ "audio" "utmp" ];
+        };
+      };
+    };
+
+    sops = {
+      secrets.mpdpass = { owner = "mpd"; };
+    };
+
+    environment.systemPackages = with pkgs; [
+      pciutils
+      alsa-utils
+      mpv
+    ];
+
+    services.mpd = {
+      enable = true;
+      musicDirectory = "/media";
+      user = "mpd";
+      group = "mpd";
+      network = {
+        port = 3254;
+        listenAddress = "any";
+      };
+      credentials = [
+        {
+          passwordFile = config.sops.secrets.mpdpass.path;
+          permissions = [
+            "read"
+            "add"
+            "control"
+            "admin"
+          ];
+        }
+      ];
+    };
+  };
+
+}