docs: revamp the attachment documentation

docs.json

@@ -216,7 +216,6 @@
                 "group": "Supabase",
                 "pages": [
                   "integration-guides/supabase-+-powersync",
-                  "integration-guides/supabase-+-powersync/handling-attachments",
                   "integration-guides/supabase-+-powersync/realtime-streaming",
                   "integration-guides/supabase-+-powersync/rls-and-sync-rules",
                   "integration-guides/supabase-+-powersync/local-development"
@@ -424,14 +423,6 @@
                   "tutorials/client/sdks/web/next-js"
                 ]
               },
-              {
-                "group": "Attachments / Files",
-                "pages": [
-                  "tutorials/client/attachments-and-files/overview",
-                  "tutorials/client/attachments-and-files/aws-s3-storage-adapter",
-                  "tutorials/client/attachments-and-files/pdf-attachment"
-                ]
-              },
               {
                 "group": "Performance",
                 "pages": [
@@ -693,6 +684,22 @@
     {
       "source": "/client-sdk-references/kotlin-multiplatform/libraries/room",
       "destination": "/client-sdk-references/kotlin/libraries/room"
+    },
+    {
+      "source": "/tutorials/client/attachments-and-files/overview",
+      "destination": "/usage/use-case-examples/attachments-files"
+    },
+    {
+      "source": "/tutorials/client/attachments-and-files/aws-s3-storage-adapter",
+      "destination": "/usage/use-case-examples/attachments-files"
+    },
+    {
+      "source": "/tutorials/client/attachments-and-files/pdf-attachment",
+      "destination": "/usage/use-case-examples/attachments-files"
+    },
+    {
+      "source": "/integration-guides/supabase-+-powersync/handling-attachments",
+      "destination": "/usage/use-case-examples/attachments-files"
     }
   ]
 }