Add rivet schema (#3485)

Author: abcxff

src/api/json/catalog.json

@@ -5750,6 +5750,19 @@
       "description": "Minecraft 1.12 Forge mod 'Custom Main Menu' config",
       "fileMatch": ["mainmenu.yml", "mainmenu.yaml", "mainmenu.json"],
       "url": "https://json.schemastore.org/minecraft-custom-main-menu-mod.json"
+    },
+    {
+      "name": "rivet.yaml",
+      "description": "Rivet game configuration file",
+      "fileMatch": [
+        "rivet.yaml",
+        "rivet.*.yaml",
+        "rivet.toml",
+        "rivet.*.toml",
+        "rivet.json",
+        "rivet.*.json"
+      ],
+      "url": "https://rivet.gg/rivet.schema.json"
     }
   ]
 }