refactor!: rewrite following dendritic patterns

modules/nix/nix-config.nix

@@ -0,0 +1,18 @@
+{
+  flake.nixConfig = {
+    extra-trusted-public-keys = [
+      "marpa-local:XoO+dFN4PeauF52pYuy3Vh4Sdtl2qIdxu5aUasWKv6Q="
+      "phundrak.cachix.org-1:osJAkYO0ioTOPqaQCIXMfIRz1/+YYlVFkup3R2KSexk="
+      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+    ];
+    extra-substituters = [
+      "http://marpa:5000?priority=5"
+      "https://phundrak.cachix.org?priority=10"
+      "https://nix-community.cachix.org?priority=20"
+      "https://cache.nixos.org?priority=40"
+    ];
+    extra-experimental-features = [ "nix-command" "flakes" ];
+    http-connections = 128;
+  };
+}

modules/nix/tools/hetzner.nix

@@ -0,0 +1,14 @@
+{inputs, ...}:
+{
+  flake-file.inputs.srvos = {
+    url = "github:nix-community/srvos";
+    inputs.nixpkgs.follows = "nixpkgs";
+  };
+  flake.modules.nixos.hetzner-server = {
+    imports = [
+      inputs.srvos.nixosModules.server
+      inputs.srvos.nixosModules.hardware-hetzner-cloud
+      inputs.srvos.nixosModules.mixins-terminfo
+    ];
+  };
+}

modules/nix/tools/sops.nix

@@ -0,0 +1,16 @@
+{inputs, ...}:
+{
+  flake-file.inputs.sops-nix = {
+    url = "github:Mic92/sops-nix";
+    inputs.nixpkgs.follows = "nixpkgs";
+  };
+
+  flake.modules = {
+    nixos.sops = {
+      imports = [inputs.sops-nix.nixosModules.sops];
+    };
+    homeManager.sops = {
+      imports = [inputs.sops-nix.homeManagerModules.sops];
+    };
+  };
+}