[Workflows] Cleaning up "Platform" sidebar (#20612)

* Removing link to irrelevant chapter.

* Removing redundant overview page.

* Setting up redirect.

* Editing redirect to something more relevant.

Author: Oxyjun

public/_redirects

@@ -1644,6 +1644,10 @@
 /workers/observability/baselime-integration/ /workers/observability/integrations/baselime-integration/ 301
 /workers-ai/tutorials/image-generator-flux/ /workers-ai/tutorials/image-generation-playground/ 301
 
+# workflows
+
+/workflows/reference/storage-options/ /workers/platform/storage-options/ 301
+
 # workers KV
 /kv/platform/environments/ /kv/reference/environments/ 301
 /kv/platform/kv-commands/ /kv/reference/kv-commands/ 301

src/content/docs/workflows/reference/index.mdx

@@ -3,6 +3,8 @@ pcx_content_type: navigation
 title: Platform
 sidebar:
   order: 8
+  group:
+    hideIndex: true
 
 ---