docs: docs for export OAS from restified endpoint

This PR adds docs for the new console feature to download the OAS from the testified end point.

PR-URL: https://github.com/hasura/graphql-engine-mono/pull/9740
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Sean Park-Ross <94021366+seanparkross@users.noreply.github.com>
GitOrigin-RevId: 8a0ea766a5199d1689db330d720312407fa8a5d7

docs/docs/restified/export-oas.mdx

@@ -0,0 +1,35 @@
+---
+description: Export OpenAPI spec from REST endpoints
+sidebar_label: Export OpenAPI Specification
+title: 'Export OpenAPI Specification'
+keywords:
+  - hasura
+  - docs
+  - RESTified
+  - REST
+  - endpoint
+sidebar_position: 3
+hide_table_of_contents: true
+---
+
+import SampleAppBlock from '@site/src/components/SampleAppBlock';
+import Thumbnail from '../../src/components/Thumbnail';
+import GraphiQLIDE from '@site/src/components/GraphiQLIDE';
+import VersionedLink from '@site/src/components/VersionedLink';
+
+# Export OpenAPI Specification
+
+The OpenAPI Specification (OAS) is widely used in REST API development to provide a standardized format for documenting
+RESTful APIs.
+
+You can download the OpenAPI 3 specification (OAS 3.0) as a JSON file for all the RESTified GraphQL Endpoints for admin
+roles by clicking in the `Export OpenAPI Spec` button from the `REST endpoints` tab from the API section.
+ 
+<Thumbnail
+  src="/img/restified/restified-OAS-spec.png"
+  alt="Create RESTified Endpoint"
+  width="1000px"
+/>
+
+You can also <VersionedLink to="/api-reference/restified/#openapi-3-specification">utilize the API</VersionedLink> to
+download the OpenAPI 3 specification

docs/docs/restified/restified-config.mdx

@@ -7,7 +7,7 @@ keywords:
   - REST
   - endpoint
   - config
-sidebar_position: 3
+sidebar_position: 4
 toc_max_heading_level: 3
 ---