feat: implement namespace management and improve build process

command/stop.ts

@@ -1,6 +1,7 @@
 import { defineCommand } from "citty";
 import { Listr } from "listr2";
-import { listManagedDeployments, scaleDeployment } from "../lib/shared";
+import { assertManagedNamespace } from "../lib/apply";
+import { getProject, listManagedDeployments, scaleDeployment } from "../lib/shared";
 
 export const stop = defineCommand({
   meta: {
@@ -8,6 +9,7 @@ export const stop = defineCommand({
     description: "Scale managed deployments to zero",
   },
   async run() {
+    await assertManagedNamespace(getProject());
     const deployments = await listManagedDeployments();
 
     await new Listr([