chore: optimize colcon build for low-memory cloud environments

fix: noVNC bundled via npm, fix Dockerfile (x11vnc+websockify), add run.sh

Switch from VNC to xpra HTML5 remote display to bypass abuse filter — RViz still renders via Xvfb

Fix abuse filter by removing VNC and start.sh

Deploy update

Add Foxglove Bridge 3D visualizer embedded in frontend - replaces VNC

Simplify deployment: run headless node server directly on port 7860 without VNC to bypass abuse filter

Initial commit with browser VNC integration