feat(aarch64): add initial configuration for NixOS on ARM

Introduced hardware and system configurations for the aarch64 NixOS system. Includes hardware setup, base system packages, and enabling key services such as Docker and Podman. This establishes the foundation for managing ARM-based systems.

systems/aarch64-linux/m4nix/default.nix

@@ -0,0 +1,76 @@
+{ pkgs, lib, ... }:
+with lib;
+with lib.metacfg;
+{
+  imports = [
+    ./hardware-configuration.nix
+  ];
+
+  metacfg = {
+    base.enable = true;
+    gui.enable = true;
+    nix-ld.enable = true;
+    nix.enable = true;
+    podman.enable = true;
+    secureboot.enable = false;
+    tools = {
+      direnv.enable = true;
+      #git.enable = true;
+    };
+    user.extraGroups = [
+      "docker"
+      "dialout"
+    ];
+  };
+
+  environment.systemPackages = with pkgs; [
+    azure-cli
+    cloudflare-warp
+    desktop-file-utils
+    kubectl
+    kubectx
+    k9s
+    attic-client
+    piper
+  ];
+
+  services.ratbagd.enable = true;
+
+  services.resolved.enable = true;
+  services.resolved.dnssec = "allow-downgrade";
+  services.resolved.extraConfig = ''
+    ResolveUnicastSingleLabel=yes
+  '';
+
+  systemd.packages = [ pkgs.cloudflare-warp ]; # for warp-cli
+
+  virtualisation = {
+    docker.enable = true;
+    podman.dockerCompat = false;
+  };
+
+  system.autoUpgrade = {
+    enable = true;
+    operation = "boot";
+    allowReboot = false;
+  };
+
+  systemd.user.extraConfig = "DefaultLimitNOFILE=32768";
+
+  security.pam.loginLimits = [
+    {
+      domain = "*";
+      item = "nofile";
+      type = "-";
+      value = "32768";
+    }
+    {
+      domain = "*";
+      item = "memlock";
+      type = "-";
+      value = "32768";
+    }
+  ];
+
+  system.stateVersion = "23.11";
+}