Generate docs for coder metadata

Author: kylecarbs

docs/resources/metadata.md

@@ -53,6 +53,10 @@ resource "coder_metadata" "pod_info" {
 - `item` (Block List, Min: 1) Each "item" block defines a single metadata item consisting of a key/value pair. (see [below for nested schema](#nestedblock--item))
 - `resource_id` (String) The "id" property of another resource that metadata should be attached to.
 
+### Optional
+
+- `hide` (Boolean) Hide the resource from the UI.
+
 ### Read-Only
 
 - `id` (String) The ID of this resource.

templates/index.md.tmpl

@@ -8,8 +8,6 @@ description: |-
 
 # Coder Provider
 
--> This works with a closed-alpha of [Coder](https://coder.com). For access, contact [[email protected]](mailto:[email protected]).
-
 ## Example
 
 {{tffile "examples/provider/provider.tf"}}