feat: add support of rendering lanelet map

[ktro2828]

What

This PR adds new feature to render lanelet map on 3D space and street view.

To render lanelet map, ensure that your T4 dataset includes map/lanelet2_map.osm file.

On the street view, which is right side of panel, black lines represents road borders of lanelet.

We can render lanelet map by using CLI, or RerunViewer directly:

# CLI
t4viz scene <DATASET_PATH>

# RerunViewer

>>> from t4_devkit.viewer import RerunViewer
>>> viewer = RerunViewer(app_id="foo")
>>> viewer.render_map(<OSM_FILEPATH>)

[github-actions]

☂️ Python Coverage

current status: ❌

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
2651	1834	69%	50%	🟢

New Files

File	Coverage	Status
t4_devkit/lanelet/init.py	100%	🟢
t4_devkit/lanelet/parser.py	77%	🔴
t4_devkit/viewer/lanelet.py	59%	🔴
TOTAL	79%	🔴

Modified Files

File	Coverage	Status
t4_devkit/helper/rendering.py	13%	🔴
t4_devkit/tier4.py	18%	🔴
t4_devkit/viewer/viewer.py	84%	🟢
TOTAL	39%	🔴

updated for commit: add5ea4 by action🐍

[Copilot]

Pull Request Overview

This PR adds lanelet map rendering functionality to the T4 viewer, enabling visualization of vector maps in both 3D space and street view. The implementation introduces a new LaneletParser for processing OSM files and integrates lanelet rendering into the existing viewer infrastructure.

• Adds LaneletParser to parse OSM XML files containing lanelet map data
• Implements lanelet rendering functions for visualizing roads, traffic elements, and road borders
• Integrates automatic map rendering into scene visualization workflows

Reviewed Changes

Copilot reviewed 12 out of 13 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
t4_devkit/lanelet/parser.py	Core parser for OSM XML files with nodes, ways, and relations
t4_devkit/viewer/lanelet.py	Rendering functions for lanelet elements in 3D and geographic views
t4_devkit/viewer/viewer.py	Integration of map rendering into RerunViewer
t4_devkit/helper/rendering.py	Automatic map rendering in scene visualization methods
t4_devkit/tier4.py	Property additions for map and annotation directory paths
tests/	Test files and sample OSM data for validation

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