move aspects into folder

modules/aspects/tailscale.nix

@@ -0,0 +1,42 @@
+{ ... }:
+{
+  flake.nixosModules.tailscale =
+    {
+      config,
+      lib,
+      ...
+    }:
+    with lib;
+    let
+      cfg = config.c.services.mesh;
+    in
+    {
+      options.c.services.mesh = {
+        enable = mkEnableOption "Enable tailscale daemon.";
+        exitNode = mkOption {
+          type = types.bool;
+          default = false;
+          description = "Enable advertising as an exit node.";
+        };
+        keyFile = mkOption {
+          type = types.path;
+          description = "Path to key file.";
+        };
+      };
+      config = mkIf cfg.enable {
+        services.tailscale = {
+          enable = true;
+          openFirewall = true;
+          authKeyFile = cfg.keyFile;
+          extraUpFlags = [
+            "--login-server"
+            "https://mesh.cleslie.uk"
+          ];
+          extraSetFlags = [ (mkIf cfg.exitNode "--advertise-exit-node") ];
+        };
+        networking.firewall = {
+          trustedInterfaces = [ config.services.tailscale.interfaceName ];
+        };
+      };
+    };
+}