update overall module structure, remove host-specific config files

- update flake.nix to reflect new structure
- update modules/default.nix imports
- update modules/network.nix and wireguard.nix
- remove config/configuration.nix and hardware-configuration.nix
- remove modules/access.nix from this module's scope

flake.nix

@@ -1,25 +1,12 @@
 {
-  description = "Server Configuration for WireGuard provider";
+  description = "Simple WireGuard tunnelbroker, with optional failover using BGP";
 
   inputs = {
-    nixpkgs.url = "nixpkgs/nixos-25.05";
-    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
-
-    sops-nix.url = "github:Mic92/sops-nix";
-    sops-nix.inputs.nixpkgs.follows = "nixpkgs";
-
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
   };
 
-  outputs = { self, nixpkgs, nixpkgs-unstable, sops-nix, }@attrs: {
-    nixosConfigurations = {
-      "tunnels" = nixpkgs.lib.nixosSystem {
-        system = "x86_64-linux";
-        specialArgs = attrs;
-        modules = [
-          (import ./config/maa1-ops/configuration.nix)
-          sops-nix.nixosModules.sops
-        ];
-      };
-    };
+  outputs = { self, nixpkgs }: {
+    nixosModules.default = import ./modules;
+    nixosModules.sixnix = import ./modules;
   };
 }