Merge dagger.io/dagger/engine into dagger.io/dagger

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

tests/tasks/dockerfile/labels.cue

@@ -1,15 +1,15 @@
 package testing
 
 import (
-	"dagger.io/dagger/engine"
+	"dagger.io/dagger"
 )
 
-engine.#Plan & {
+dagger.#Plan & {
 	inputs: directories: testdata: path: "./testdata"
 
 	actions: {
 		// FIXME: this doesn't test anything beside not crashing
-		build: engine.#Dockerfile & {
+		build: dagger.#Dockerfile & {
 			source: inputs.directories.testdata.contents
 			dockerfile: contents: """
 				FROM alpine:latest@sha256:ab00606a42621fb68f2ed6ad3c88be54397f981a7b70a79db3d1172b11c4367d