🤖 Add Codex marketplace metadata

plugins/dioxus/.codex-plugin/plugin.json

@@ -0,0 +1,22 @@
+{
+  "name": "dioxus",
+  "version": "0.1.0",
+  "description": "Dioxus Rust UI library reference skills, pinned per Dioxus version (currently 0.7).",
+  "author": {
+    "name": "Gabor Korber",
+    "email": "gab@g4b.org"
+  },
+  "skills": "./skills/",
+  "interface": {
+    "displayName": "Dioxus",
+    "shortDescription": "Per-version Dioxus Rust UI reference skills.",
+    "longDescription": "Dioxus 0.7+ API reference for Rust UI work, including components, signals, RSX, assets, routing, fullstack, and hydration.",
+    "developerName": "Gabor Korber",
+    "category": "Coding",
+    "capabilities": ["Skills"],
+    "defaultPrompt": [
+      "Use Dioxus 0.7 patterns for this Rust UI change.",
+      "Check this Dioxus component against 0.7 APIs."
+    ]
+  }
+}