feat(plugin): add kubernetes sandbox provider

packages/plugins/sandbox-providers/kubernetes/test/integration/_kind-harness.ts

@@ -0,0 +1,22 @@
+import { execSync } from "node:child_process";
+import { readFileSync } from "node:fs";
+import { homedir } from "node:os";
+import { join } from "node:path";
+
+export const KIND_CONTEXT = "kind-paperclip";
+
+export function readKindKubeconfig(): string {
+  return readFileSync(join(homedir(), ".kube", "config"), "utf-8");
+}
+
+export function kubectl(args: string): string {
+  return execSync(`kubectl --context ${KIND_CONTEXT} ${args}`, { encoding: "utf-8" });
+}
+
+export function deleteNamespaceIfExists(namespace: string): void {
+  try {
+    kubectl(`delete namespace ${namespace} --wait=true --timeout=60s --ignore-not-found`);
+  } catch {
+    // ignore
+  }
+}