feat: initial NixOS home lab infrastructure setup

- Add modular flake-based NixOS configuration
- Implement GitOps foundation with CI/CD pipeline
- Create comprehensive documentation and branching strategy
- Add modular desktop environments (GNOME, Cosmic, Sway)
- Configure virtualization stack (Incus, Libvirt, Podman)
- Set up development tools and hardware-specific modules
- Establish user configuration with literate programming support

This commit represents the completion of Phase 1: Flakes Migration
with modular configuration, virtualization, and GitOps foundation.

machines/sleeper-service/transmission.nix

@@ -0,0 +1,20 @@
+{ config, pkgs, ... }:
+
+{
+  services.transmission = {
+    enable = true;
+    user = "geir";
+    group = "users";
+    #home = "/mnt/storage/";
+    settings.rpc-port = 9091;
+    settings.rpc-bind-address = "0.0.0.0";
+    #openRPCPort = true;
+    downloadDirPermissions = "770";
+    settings = {
+      download-dir = "/mnt/storage";
+      #rpc-whitelist-enabled = true;
+      rpc-whitelist = "127.0.0.1,10.0.0.*,100.*.*.*";
+      rpc-host-whitelist = "idea,files,nixos-work,server1";
+    };
+  };
+}