Europa: integrate core packages, separate universe

Signed-off-by: Solomon Hykes <solomon@dagger.io>

europa-universe/python/python.cue

@@ -0,0 +1,24 @@
+// Helpers to run python programs
+package python
+
+import (
+	"universe.dagger.io/docker"
+
+	"universe.dagger.io/alpine"
+)
+
+// Run a python script in a container
+#Run: docker.#Run & {
+	script: string
+	cmd: {
+		name: "python"
+		flags: "-c": script
+	}
+
+	// As a convenience, image defaults to a ready-to-use python environment
+	image: docker.#Image | *_defaultImage
+
+	_defaultImage: alpine.#Image & {
+		packages: python: version: "3"
+	}
+}