[Docs] re-organize nemotron cookbook (#27240)

docs_new/cookbook/autoregressive/NVIDIA/Nemotron3-Nano-Omni.mdx

@@ -2,8 +2,6 @@
 title: Nemotron 3 Nano Omni
 metatags:
     description: "Deploy NVIDIA Nemotron 3 Nano Omni multimodal MoE model with SGLang - text, image, video, and audio inputs with reasoning and tool calling."
-tag:
-    NEW
 ---
 
 import { Nemotron3NanoOmniDeployment } from '/src/snippets/autoregressive/nemotron3-nano-omni-deployment.jsx';

docs_new/cookbook/autoregressive/NVIDIA/Nemotron3-Ultra.mdx

@@ -1,7 +1,6 @@
 ---
 title: NVIDIA Nemotron3-Ultra
-metatags:
-    description: "Deploy NVIDIA Nemotron3-Ultra with SGLang - 550B hybrid MoE model (55B active) with 1M context window, BF16/NVFP4 support, built for long-running autonomous agents."
+description: "Deploy NVIDIA Nemotron3-Ultra with SGLang - 550B hybrid MoE model (55B active) with 1M context window, BF16/NVFP4 support, built for long-running autonomous agents."
 tag:
     NEW
 ---

docs_new/cookbook/autoregressive/intro.mdx

@@ -58,7 +58,7 @@ metatags:
   <Card
     title="NVIDIA"
     mode="card"
-    href="/cookbook/autoregressive/NVIDIA/Nemotron3-Nano-Omni"
+    href="/cookbook/autoregressive/NVIDIA/Nemotron3-Ultra"
     img="/cards/logos/nvidia.png"
   />
   <Card

docs_new/docs.json

@@ -1005,10 +1005,10 @@
                   {
                     "group": "NVIDIA",
                     "pages": [
+                      "cookbook/autoregressive/NVIDIA/Nemotron3-Ultra",
                       "cookbook/autoregressive/NVIDIA/Nemotron3-Nano-Omni",
                       "cookbook/autoregressive/NVIDIA/Nemotron3-Nano",
-                      "cookbook/autoregressive/NVIDIA/Nemotron3-Super",
-                      "cookbook/autoregressive/NVIDIA/Nemotron3-Ultra"
+                      "cookbook/autoregressive/NVIDIA/Nemotron3-Super"
                     ]
                   },
                   {