Add new Cursor artifacts

Co-authored-by: Codex <codex@openai.com>

models/grok-4-3-cursor.json

@@ -0,0 +1,17 @@
+{
+  "label": "Grok 4.3",
+  "vendor": "xAI",
+  "harness": "Cursor",
+  "effort": "Default",
+  "artifactDir": "grok-4-3/cursor-default",
+  "order": 61,
+  "runs": {
+    "mythos-craft": {
+      "note": {
+        "zh": "在 Cursor 中以 Grok 4.3 默认设置一次生成；本页为未经修改的原始产出。",
+        "en": "Generated in one shot by Grok 4.3 inside Cursor with default settings; unmodified original output."
+      },
+      "contributor": "Nagi-ovo"
+    }
+  }
+}