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/azure/storage/st.cue

@@ -0,0 +1,52 @@
+package storage
+
+import (
+	"alpha.dagger.io/azure"
+	"alpha.dagger.io/os"
+	"alpha.dagger.io/dagger"
+)
+
+// Create a storage account
+#StorageAccount: {
+	// Azure Config
+	config: azure.#Config
+
+	// ResourceGroup name
+	rgName: string & dagger.#Input
+
+	// StorageAccount location
+	stLocation: string & dagger.#Input
+
+	// StorageAccount name
+	stName: string & dagger.#Input
+
+	// StorageAccount Id
+	id: string & dagger.#Output
+
+	// Container image
+	ctr: os.#Container & {
+		image: azure.#CLI & {
+			"config": config
+		}
+		always: true
+
+		command: """
+			az storage account create -n "$AZURE_STORAGE_ACCOUNT" -g "$AZURE_DEFAULTS_GROUP" -l "$AZURE_DEFAULTS_LOCATION"
+			az storage account show -n "$AZURE_STORAGE_ACCOUNT" -g "$AZURE_DEFAULTS_GROUP" --query "id" -o json | jq -r . | tr -d "\n" > /storageAccountId
+			"""
+
+		env: {
+			AZURE_DEFAULTS_GROUP:    rgName
+			AZURE_DEFAULTS_LOCATION: stLocation
+			AZURE_STORAGE_ACCOUNT:   stName
+		}
+	}
+
+	// StorageAccount Id
+	id: ({
+		os.#File & {
+			from: ctr
+			path: "/storageAccountId"
+		}
+	}).contents
+}

pkg/alpha.dagger.io/azure/storage/tests/st.cue

@@ -0,0 +1,28 @@
+package storage
+
+import (
+	"alpha.dagger.io/azure"
+	"alpha.dagger.io/azure/resourcegroup"
+	"alpha.dagger.io/azure/storage"
+	"alpha.dagger.io/random"
+)
+
+TestConfig: azureConfig: azure.#Config & {
+}
+
+TestSuffix: random.#String & {
+	seed: "azst"
+}
+
+TestRG: resourcegroup.#ResourceGroup & {
+	config:     TestConfig.azureConfig
+	rgName:     "rg-test-\(TestSuffix.out)"
+	rgLocation: "eastus2"
+}
+
+TestStorage: storage.#StorageAccount & {
+	config:     TestConfig.azureConfig
+	rgName:     "rg-test-ahkkzwyoaucw"
+	stLocation: "eastus2"
+	stName:     "st\(TestSuffix.out)001"
+}