feat: organize all services into separate stacks by dependency

cache-infrastructure/index.ts

@@ -0,0 +1,17 @@
+import { Construct } from "constructs";
+import { TerraformStack } from "cdktf";
+import { KubernetesProvider } from "@cdktf/provider-kubernetes/lib/provider";
+import { NixCache } from "./nixcache";
+
+export class CacheInfrastructure extends TerraformStack {
+  constructor(scope: Construct, id: string) {
+    super(scope, id);
+
+    const kubernetes = new KubernetesProvider(this, "kubernetes", {
+      configPath: "~/.kube/config",
+    });
+
+    // Add cache-related infrastructure components here
+    new NixCache(this, "nix-cache", kubernetes);
+  }
+}