Initial commit: RangeView Crazyflie ToF mapping client

DearPyGui app that visualizes the Multi-ranger ToF sensors and builds a top-down map of the drone's surroundings. Handheld and experimental hardened-scan capture, Flow-deck drift correction (ZUPT), props-off dry-run mode, and optional 3D point-cloud streaming to CloudView.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

rangeview/__main__.py

@@ -0,0 +1,6 @@
+"""Allow `python -m rangeview`."""
+
+from .app import main
+
+if __name__ == "__main__":
+    main()