docs: ♻️ merge API Reference and Universe menu entries

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

docs/reference/kubernetes/README.md

@@ -0,0 +1,44 @@
+---
+sidebar_label: kubernetes
+---
+
+# alpha.dagger.io/kubernetes
+
+Kubernetes client operations
+
+```cue
+import "alpha.dagger.io/kubernetes"
+```
+
+## kubernetes.#Kubectl
+
+Kubectl client
+
+### kubernetes.#Kubectl Inputs
+
+| Name             | Type                      | Description        |
+| -------------    |:-------------:            |:-------------:     |
+|*version*         | `*"v1.19.9" \| string`    |Kubectl version     |
+
+### kubernetes.#Kubectl Outputs
+
+_No output._
+
+## kubernetes.#Resources
+
+Apply Kubernetes resources
+
+### kubernetes.#Resources Inputs
+
+| Name             | Type                      | Description                                              |
+| -------------    |:-------------:            |:-------------:                                           |
+|*source*          | `dagger.#Artifact`        |Kubernetes config to deploy                               |
+|*manifest*        | `*null \| string`         |Kubernetes manifest to deploy inlined in a string         |
+|*url*             | `*null \| string`         |Kubernetes manifest url to deploy remote configuration    |
+|*namespace*       | `*"default" \| string`    |Kubernetes Namespace to deploy to                         |
+|*version*         | `*"v1.19.9" \| string`    |Version of kubectl client                                 |
+|*kubeconfig*      | `string`                  |Kube config file                                          |
+
+### kubernetes.#Resources Outputs
+
+_No output._