UI overhaul, VPN management, controlsd fix, screen recorder removal

- Fix controlsd crash: self.state.name AttributeError when state is int
- Move telemetry tlog import to module level in carstate.py (was per-frame)
- Remove FrogPilot screen recorder from UI (was crashing OMX on init)
- Ready screen: boot logo background, 8-bit READY! sprite, error states
  (panda not connected, car not recognized) with 10s startup grace period
- ClearPilot menu: always opens to General, QButtonGroup for sidebar,
  System Status uses ButtonControl, VPN toggle with process control
- Sidebar hidden on construction (no flash before splash)
- Status window: threaded data collection (QtConcurrent), panda detection
  via scene.pandaType (SPI, not USB), only refreshes when visible
- VPN: moved to system/clearpilot/, SIGTERM graceful shutdown, keepalive
  ping through tunnel, killall openvpn on disable, launched from
  launch_openpilot.sh instead of continue.sh
- Disable gpsd and dashcamd temporarily for perf testing

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

common/params.cc

@@ -199,6 +199,7 @@ std::unordered_map<std::string, uint32_t> keys = {
     {"Timezone", PERSISTENT},
     {"TrainingVersion", PERSISTENT},
     {"UbloxAvailable", PERSISTENT},
+    {"VpnEnabled", CLEAR_ON_MANAGER_START},
     {"UpdateAvailable", CLEAR_ON_MANAGER_START | CLEAR_ON_ONROAD_TRANSITION},
     {"UpdateFailedCount", CLEAR_ON_MANAGER_START},
     {"UpdaterAvailableBranches", PERSISTENT},