Add remappable controller controls with a Controller Options tab

Add a player_controls config group that maps game actions to controller
inputs, and a Controller Options menu tab to rebind them in-headset.

- 45 actions: movement, click/double-click, jump, fire, and the engine's own
  keyboard hotkeys (posture, save/load, weapon/MFD select, etc.), sent to the
  engine as synthetic key events. Cheat and dead hotkeys are not exposed.
- Press-to-capture rebinding with per-input exclusivity, Reset to Defaults
  (built-in defaults, then questshock.config.default.json), and new defaults:
  left stick moves/strafes, right stick turns.
- Controller profiles for Touch, Vive and generic OpenXR
  (res/controller_profiles/), matched to the active interaction profile at
  runtime, with a fatal dialog if a profile's bindings are rejected at
  startup.
- The menu's thumbstick locomotion is disabled while the Controller Options
  tab is open or a capture is active. A scrollable list with a tap-to-jump
  scroll bar handles the long action list.
- Opening the menu pauses a running game and resumes it on close.
- Reset Position now keeps the player's facing instead of turning the screen
  to the current gaze.
- Play the intro video in the game's language (engine patch 23), falling back
  to English.
- Watchdog and shared-key handling for stuck movement keys, plus key-edge
  logging.

build-image/prepare-android-project.sh

@@ -92,6 +92,7 @@ cp -a "$ANDROID_DIR/gles-shaders/." "$ASSETS_DIR/shaders/"
 cp "/opt/prebuilt/soundfont/default.sf2" "$ASSETS_DIR/res/soundfont.sf2"
 cp "$REPO_ROOT/res/assets/GET_ASSETS_QUEST.txt" "$ASSETS_DIR/GET_ASSETS_QUEST.txt"
 cp "$REPO_ROOT/res/questshock.config.default.json" "$ASSETS_DIR/questshock.config.default.json"
+cp -a "$REPO_ROOT/res/controller_profiles" "$ASSETS_DIR/controller_profiles"
 
 echo "== Staging prebuilt Android SDL2/SDL2_mixer/fluidsynth-lite/openxr .so's into jniLibs =="
 # gl4es is deliberately absent here - it's no longer prebuilt, it's compiled