cue modules: move stdlib to pkg/alpha.dagger.io

In preparation for Europa, we will vendor multiple CUE modules:

- `pkg/alpha.dagger.io`: legacy non-europa packages
- `pkg/dagger.io`: core Europa packages
- `pkg/universe.dagger.io`: Europa universe

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

pkg/alpha.dagger.io/kubernetes/tests/kubernetes.cue

@@ -0,0 +1,61 @@
+package kubernetes
+
+import (
+	"encoding/yaml"
+	"alpha.dagger.io/random"
+)
+
+// We assume that a kinD cluster is running locally
+// To deploy a local KinD cluster, follow this link : https://kind.sigs.k8s.io/docs/user/quick-start/
+TestKubeconfig: string @dagger(input)
+
+TestKubeApply: {
+	suffix: random.#String & {
+		seed: ""
+	}
+
+	// Pod spec
+	kubeSrc: {
+		apiVersion: "v1"
+		kind:       "Pod"
+		metadata: name: "kube-test-\(suffix.out)"
+		spec: {
+			restartPolicy: "Never"
+			containers: [{
+				name:  "test"
+				image: "hello-world"
+			}]
+		}
+	}
+
+	// Apply deployment
+	resources: #Resources & {
+		kubeconfig: TestKubeconfig
+		namespace:  "dagger-test"
+		manifest:   yaml.Marshal(kubeSrc)
+	}
+
+	// Verify deployment
+	verify: #VerifyApply & {
+		podname:   kubeSrc.metadata.name
+		namespace: resources.namespace
+	}
+}
+
+TestLinkApply: {
+	// Podname from hello-world-pod
+	_podname: "hello-world"
+
+	// Apply deployment
+	resources: #Resources & {
+		kubeconfig: TestKubeconfig
+		namespace:  "dagger-test"
+		url:        "https://gist.githubusercontent.com/grouville/04402633618f3289a633f652e9e4412c/raw/293fa6197b78ba3fad7200fa74b52c62ec8e6703/hello-world-pod.yaml"
+	}
+
+	// Verify deployment
+	verify: #VerifyApply & {
+		podname:   _podname
+		namespace: resources.namespace
+	}
+}