feat(rviz): add topic text overlay plugin

[satoshi-ota]

Description

This PR adds a new RViz panel plugin for overlaying selected topic text in the 3D view.

The plugin provides a panel that lists supported text-like topics and lets users select one or more topics to display as an overlay. The overlay shows the topic name in a distinguishable color and the
latest text content in white, making it easier to monitor debug/status messages directly in RViz.

Supported inputs include:

• autoware_internal_debug_msgs/msg/*Stamped debug message types
• tier4_debug_msgs/msg/StringStamped
• visualization_msgs/msg/Marker
• visualization_msgs/msg/MarkerArray

For Marker and MarkerArray, only TEXT_VIEW_FACING markers are used. For MarkerArray, namespaces can be selected so users can filter which marker text is shown. The selected topics and marker namespaces are
persisted in the RViz config.

movie-2026-04-17_10.54.10.mp4

Related links

Parent Issue:

• Link

How was this PR tested?

• Built the new RViz plugin package with colcon build.
• Launched RViz and verified that selected supported topics are rendered as text overlays.
• Verified that multiple selected topics can be displayed at the same time.
• Verified that MarkerArray namespace selection filters displayed text.
• Verified that RViz config save/load preserves selected topics and marker namespaces.
• Verified that topic names are shown without message type labels in the overlay.

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

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Codecov Report

❌ Patch coverage is 0% with 470 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@331eae6). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...erlay_rviz_plugin/src/topic_text_overlay_panel.cpp	0.00%	470 Missing ⚠️

Additional details and impacted files

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