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/azure.cue

@@ -0,0 +1,53 @@
+// Azure base package
+package azure
+
+import (
+	"alpha.dagger.io/dagger"
+	"alpha.dagger.io/docker"
+	"alpha.dagger.io/os"
+)
+
+// Default Azure CLI version
+let defaultVersion = "2.27.1@sha256:1e117183100c9fce099ebdc189d73e506e7b02d2b73d767d3fc07caee72f9fb1"
+
+//Azure Config shared by all Azure packages
+#Config: {
+	// AZURE tenant id
+	tenantId: dagger.#Secret & dagger.#Input
+	// AZURE subscription id
+	subscriptionId: dagger.#Secret & dagger.#Input
+	// AZURE app id for the service principal used
+	appId: dagger.#Secret & dagger.#Input
+	// AZURE password for the service principal used
+	password: dagger.#Secret & dagger.#Input
+}
+
+// Azure Cli to be used by all Azure packages
+#CLI: {
+	// Azure Config
+	config: #Config
+
+	// Azure CLI version to install
+	version: string | *defaultVersion
+
+	// Container image
+	os.#Container & {
+		image: docker.#Pull & {
+			from: "mcr.microsoft.com/azure-cli:\(version)"
+		}
+
+		always: true
+
+		command: """
+			az login --service-principal -u "$(cat /run/secrets/appId)" -p "$(cat /run/secrets/password)" -t "$(cat /run/secrets/tenantId)"
+			az account set -s "$(cat /run/secrets/subscriptionId)"
+			"""
+
+		secret: {
+			"/run/secrets/appId":          config.appId
+			"/run/secrets/password":       config.password
+			"/run/secrets/tenantId":       config.tenantId
+			"/run/secrets/subscriptionId": config.subscriptionId
+		}
+	}
+}