chore: add daemon helper for headless Lite hosting (no-camera + STUN)

run_daemon_nocam.py launches the Reachy Mini daemon with two workarounds
needed to host the Lite for remote web sessions from this Mac:
- patches get_video_device to skip the robot camera (macOS denies camera
access to background-launched daemons; the web app uses no video)
- injects a public STUN server into webrtcsink (this reachy_mini release
configures no ICE servers, so remote clients only saw LAN candidates)

Both are documented as temporary; proper fixes are granting Camera access
in System Settings and Pollen's upcoming TURN relay for remote NAT traversal.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

run_daemon_nocam.py

@@ -0,0 +1,40 @@
+"""Temporary daemon launcher with two workarounds:
+
+1. Skip the robot camera: macOS TCC denies camera access to background-launched
+   processes, and the failed video pipeline blocked the WebRTC producer. The
+   cookAIware web app doesn't use video, so audio+data is enough.
+   Proper fix when at the Mac: grant Camera permission to the launching app in
+   System Settings -> Privacy & Security -> Camera, then use reachy-mini-daemon.
+
+2. Add a public STUN server to webrtcsink: this reachy_mini release configures
+   no ICE servers, so the daemon only offers LAN host candidates and remote
+   (non-home-Wi-Fi) clients can never reach it. STUN adds a server-reflexive
+   candidate, which lets remote sessions connect through many (not all) NATs.
+   Proper fix: Pollen's upcoming TURN relay support.
+"""
+import sys
+
+from reachy_mini.media import device_detection, media_server
+
+device_detection.get_video_device = lambda: ("", None)
+media_server.get_video_device = device_detection.get_video_device
+
+_orig_configure_webrtc = media_server.GstMediaServer._configure_webrtc
+
+
+def _configure_webrtc_with_stun(self, pipeline):
+    webrtcsink = _orig_configure_webrtc(self, pipeline)
+    try:
+        webrtcsink.set_property("stun-server", "stun://stun.l.google.com:19302")
+        self._logger.info("STUN server injected into webrtcsink (stun.l.google.com:19302)")
+    except Exception as exc:  # property may not exist on older plugin builds
+        self._logger.warning(f"Could not set stun-server on webrtcsink: {exc}")
+    return webrtcsink
+
+
+media_server.GstMediaServer._configure_webrtc = _configure_webrtc_with_stun
+
+from reachy_mini.daemon.app.main import main
+
+sys.argv = ["reachy-mini-daemon", "--wake-up-on-start", "--log-level", "INFO"]
+main()