nativeFixes: HEVC decode has its own flag

packages/core-extensions/src/nativeFixes/host.ts

···
   if (moonlightHost.getConfigOption<boolean>("nativeFixes", "linuxSpeechDispatcher") ?? true) {
     app.commandLine.appendSwitch("enable-speech-dispatcher");
   }
+
+  if (moonlightHost.getConfigOption<boolean>("nativeFixes", "linuxHevcSupport") ?? true) {
+    enabledFeatures.push("PlatformHEVCDecoderSupport");
+  }
 }
 
 // NOTE: Only tested if this appears on Windows, it should appear on all when

packages/core-extensions/src/nativeFixes/manifest.json

···
       "description": "Actually implements updating Discord on Linux. Has no effect on other operating systems",
       "type": "boolean",
       "default": false
+    },
+    "linuxHevcSupport": {
+      "advice": "restart",
+      "displayName": "HEVC support on Linux",
+      "description": "You might also need to enable Vulkan renderer. Has no effect on other operating systems",
+      "type": "boolean",
+      "default": true
     }
   },
   "apiLevel": 2