docs: ♻️ merge API Reference and Universe menu entries

Signed-off-by: jffarge <jf@dagger.io>

docs/reference/dagger/README.md

@@ -0,0 +1,23 @@
+---
+sidebar_label: dagger
+---
+
+# alpha.dagger.io/dagger
+
+Dagger core types
+
+```cue
+import "alpha.dagger.io/dagger"
+```
+
+## dagger.#Secret
+
+Secret value
+
+### dagger.#Secret Inputs
+
+_No input._
+
+### dagger.#Secret Outputs
+
+_No output._

docs/reference/dagger/op.md

@@ -0,0 +1,175 @@
+---
+sidebar_label: op
+---
+
+# alpha.dagger.io/dagger/op
+
+op: low-level operations for Dagger processing pipelines
+
+```cue
+import "alpha.dagger.io/dagger/op"
+```
+
+## op.#Copy
+
+### op.#Copy Inputs
+
+_No input._
+
+### op.#Copy Outputs
+
+_No output._
+
+## op.#DockerBuild
+
+### op.#DockerBuild Inputs
+
+_No input._
+
+### op.#DockerBuild Outputs
+
+_No output._
+
+## op.#DockerLogin
+
+### op.#DockerLogin Inputs
+
+_No input._
+
+### op.#DockerLogin Outputs
+
+_No output._
+
+## op.#Exec
+
+### op.#Exec Inputs
+
+_No input._
+
+### op.#Exec Outputs
+
+_No output._
+
+## op.#Export
+
+Export a value from fs state to cue
+
+### op.#Export Inputs
+
+_No input._
+
+### op.#Export Outputs
+
+_No output._
+
+## op.#FetchContainer
+
+### op.#FetchContainer Inputs
+
+_No input._
+
+### op.#FetchContainer Outputs
+
+_No output._
+
+## op.#FetchGit
+
+### op.#FetchGit Inputs
+
+_No input._
+
+### op.#FetchGit Outputs
+
+_No output._
+
+## op.#FetchHTTP
+
+### op.#FetchHTTP Inputs
+
+_No input._
+
+### op.#FetchHTTP Outputs
+
+_No output._
+
+## op.#Load
+
+### op.#Load Inputs
+
+_No input._
+
+### op.#Load Outputs
+
+_No output._
+
+## op.#Local
+
+### op.#Local Inputs
+
+_No input._
+
+### op.#Local Outputs
+
+_No output._
+
+## op.#Mkdir
+
+### op.#Mkdir Inputs
+
+_No input._
+
+### op.#Mkdir Outputs
+
+_No output._
+
+## op.#Op
+
+One operation in a pipeline
+
+### op.#Op Inputs
+
+_No input._
+
+### op.#Op Outputs
+
+_No output._
+
+## op.#PushContainer
+
+### op.#PushContainer Inputs
+
+_No input._
+
+### op.#PushContainer Outputs
+
+_No output._
+
+## op.#Subdir
+
+### op.#Subdir Inputs
+
+_No input._
+
+### op.#Subdir Outputs
+
+_No output._
+
+## op.#Workdir
+
+### op.#Workdir Inputs
+
+_No input._
+
+### op.#Workdir Outputs
+
+_No output._
+
+## op.#WriteFile
+
+### op.#WriteFile Inputs
+
+_No input._
+
+### op.#WriteFile Outputs
+
+_No output._