[diffusion] model: support minimax-h3 (#33275)

Co-authored-by: zhenaozhenfu <zhenaozhenfu@minimaxi.com>
Co-authored-by: BBuf <1182563586@qq.com>
Co-authored-by: andyluo7 <andy.luo@amd.com>
Co-authored-by: Zijie Xia <zijie_xia@icloud.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Co-authored-by: chao-xue <877184285@qq.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

docs_new/docs.json

@@ -1488,6 +1488,13 @@
                       "cookbook/diffusion/MOVA/MOVA"
                     ]
                   },
+                  {
+                    "group": "MiniMax",
+                    "tag": "NEW",
+                    "pages": [
+                      "cookbook/diffusion/MiniMax/MiniMax-H3"
+                    ]
+                  },
                   {
                     "group": "LingBot World",
                     "pages": [