add support for XLM pre-launch script integration and non-interactive configuration modes

config.example.json

@@ -1,6 +1,12 @@
 {
-    "launcher_cmd": "flatpak run dev.goats.xivlauncher",
+    "launcher_cmd": "",
     "secret": "",
     "use_gamemode": false,
-    "gamemode_cmd": "gamemoderun"
+    "gamemode_cmd": "gamemoderun",
+    "_notes": {
+        "launcher_cmd": "Leave empty for auto-detection. Can also be passed via CLI args (e.g., Steam %command%)",
+        "secret": "Leave empty to use system keyring or prompt on launch",
+        "use_gamemode": "Set to true to use a performance tool like gamemoderun or game-performance",
+        "prelaunch": "The wrapper supports running automatically as an XLM prelaunch script if placed in prelaunch.d/"
+    }
 }