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/http/tests/http.cue

@@ -0,0 +1,62 @@
+package http
+
+import (
+	"alpha.dagger.io/alpine"
+	"alpha.dagger.io/dagger"
+	"alpha.dagger.io/docker"
+	"alpha.dagger.io/os"
+	"alpha.dagger.io/random"
+)
+
+TestDockersocket: dagger.#Stream & dagger.#Input
+
+TestSuffix: random.#String & {
+	seed: ""
+}
+
+TestRun: docker.#Run & {
+	name:   "daggerci-test-wait-\(TestSuffix.out)"
+	ref:    "nginx"
+	socket: TestDockersocket
+	ports: ["8088:80"]
+}
+
+// Waits for TestRun to finish initializing
+Testhealth: #Wait & {
+	url: "http://localhost:8088/"
+}
+
+TestWait: query: os.#Container & {
+	image: alpine.#Image & {
+		package: bash: true
+		package: curl: true
+	}
+	command: #"""
+		test "$(curl -L --fail --silent --show-error --write-out "%{http_code}" "$URL" -o /dev/null)" = "200"
+		"""#
+	env: URL: Testhealth.url
+}
+
+TestRequest: {
+	req: #Get & {
+		url: Testhealth.url
+	}
+
+	testRaw: os.#Container & {
+		image: alpine.#Image & {
+			package: jq:   true
+			package: bash: true
+		}
+		env: STATUS: "\(req.response.statusCode)"
+		files: "/content.json": {
+			content: req.response.body
+			mode:    0o500
+		}
+		shell: args: ["--noprofile", "--norc", "-eo", "pipefail", "-c"]
+		command: #Command
+	}
+	#Command: #"""
+		cat /content.json | grep -q nginx >/dev/null
+		test "$STATUS" = "200"
+		"""#
+}