Europa: integrate core packages, separate universe

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

docs/reference/europa/dagger/engine/README.md

@@ -0,0 +1,91 @@
+---
+sidebar_label: engine
+---
+
+# alpha.dagger.io/europa/dagger/engine
+
+```cue
+import "alpha.dagger.io/europa/dagger/engine"
+```
+
+## engine.#Context
+
+### engine.#Context Inputs
+
+_No input._
+
+### engine.#Context Outputs
+
+_No output._
+
+## engine.#FS
+
+A reference to a filesystem tree. For example:  - The root filesystem of a container  - A source code repository  - A directory containing binary artifacts Rule of thumb: if it fits in a tar archive, it fits in a #FS.
+
+### engine.#FS Inputs
+
+_No input._
+
+### engine.#FS Outputs
+
+_No output._
+
+## engine.#ImageConfig
+
+Container image config. See [OCI](https://www.opencontainers.org/). Spec left open on purpose to account for additional fields. [Image Spec](https://github.com/opencontainers/image-spec/blob/main/specs-go/v1/config.go) [Docker Superset](https://github.com/moby/buildkit/blob/master/frontend/dockerfile/dockerfile2llb/image.go)
+
+### engine.#ImageConfig Inputs
+
+_No input._
+
+### engine.#ImageConfig Outputs
+
+_No output._
+
+## engine.#Plan
+
+A deployment plan executed by `dagger up`
+
+### engine.#Plan Inputs
+
+_No input._
+
+### engine.#Plan Outputs
+
+_No output._
+
+## engine.#Pull
+
+Download a container image from a remote repository
+
+### engine.#Pull Inputs
+
+_No input._
+
+### engine.#Pull Outputs
+
+_No output._
+
+## engine.#Secret
+
+A reference to an external secret, for example:  - A password  - A SSH private key  - An API token Secrets are never merged in the Cue tree. They can only be used by a special filesystem mount designed to minimize leak risk.
+
+### engine.#Secret Inputs
+
+_No input._
+
+### engine.#Secret Outputs
+
+_No output._
+
+## engine.#Service
+
+A reference to a network service endpoint, for example:  - A TCP or UDP port  - A unix or npipe socket  - An HTTPS endpoint
+
+### engine.#Service Inputs
+
+_No input._
+
+### engine.#Service Outputs
+
+_No output._