feat(camera_viz): add Intel RealSense 435i V4L2 config

[jsepulveda-nvidia]

Summary

Adds examples/camera_viz/configs/v4l2-realsense.yaml, an example V4L2 config for the Intel RealSense Depth Camera 435i.

• Drives both camera_viz (receiver) and camera_streamer (RTP sender) from a single YAML.
• Uses the RealSense RGB color node (/dev/video4) at 1920×1080@30.
• Documents the RealSense 435i V4L2 node layout and how to inspect available formats with v4l2-ctl.
• Toggle source: local|rtp to control what camera_viz opens.

Test plan

• Validate config loads in camera_viz against a connected RealSense 435i.
• Validate camera_streamer RTP path with source: rtp.

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features
  • Added Intel RealSense 435i camera configuration example with V4L2 support, enabling dual streaming modes (local and RTP), 1920x1080@30fps resolution, configurable bitrate (15 Mbps), and visualization settings for camera placement and lock modes.

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ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between b212cfb and f68300e.

📒 Files selected for processing (1)

• examples/camera_viz/configs/v4l2-realsense.yaml

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📝 Walkthrough

Walkthrough

This pull request adds a new YAML configuration file for the camera visualization system. The file defines parameters for an Intel RealSense 435i camera accessed via V4L2, specifying the device node (/dev/video4), streaming mode, encoder configuration, capture resolution (1920x1080 at 30 fps), RTP streaming settings (port 5000, 15 Mbps), and visualization window placement and lock settings.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding an Intel RealSense 435i V4L2 configuration file to the camera_viz examples.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch jsepulveda-nvidia/realsense

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