Add workaround for headset with canted views

See https://gitlab.freedesktop.org/monado/monado/-/merge_requests/2312

src/main/services/bs-launcher/abstract-launcher.service.ts

@@ -73,6 +73,7 @@ export abstract class AbstractLauncherService {
                     "STEAM_COMPAT_CLIENT_INSTALL_PATH",
                     "STEAM_COMPAT_APP_ID",
                     "SteamEnv",
+                    "OXR_PARALLEL_VIEWS",
                     "PROTON_LOG",
                     "PROTON_LOG_DIR",
                 ],

src/main/services/linux.service.ts

@@ -105,6 +105,8 @@ export class LinuxService {
             "STEAM_COMPAT_APP_ID": BS_APP_ID,
             // Run game in steam environment; fixes #585 for unicode song titles
             "SteamEnv": "1",
+            // Fix reflections in Monado
+            "OXR_PARALLEL_VIEWS": "1",
         };
 
         if (launchOptions.launchMods?.includes(LaunchMods.PROTON_LOGS)) {