feat(tier4_planning_rviz_plugin): set path colors from rviz and add fade_out feature

[KhalilSelyan]

Description

Updating the style of the path/trajectory display plugin

Related links

Videos

• https://www.youtube.com/playlist?list=PL97OXOB9UA-gSyZWr3VVn4dNnBtt0lqTp

How was this PR tested?

Just run the planning sim demo.

Notes for reviewers

We don't need to modify autoware_launch rviz config file because the defaults are set in the plugin.

Interface changes

New parameters are added:

• property_min_color_("Min Velocity Color", QColor("#3F2EE3"), "", &property_path_view_)
• property_mid_color_("Mid Velocity Color", QColor("#208AAE"), "", &property_path_view_)
• property_max_color_("Max Velocity Color", QColor("#00E678"), "", &property_path_view_)
• property_fade_out_distance_{"Fade Out Distance", 0.0, "[m]", &property_path_view_}

Effects on system behavior

None.

[github-actions]

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[xmfcx]

Could you add the following parameter:
Parameter name: fade_out_distance
Description: The length from the path’s end where it gradually becomes transparent.

We can discuss the implementation once it is set from rviz

[xmfcx]

I think this is ready for review.

@KhalilSelyan could you test the last version?

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 28 lines in your changes missing coverage. Please review.

Project coverage is 26.15%. Comparing base (01d9d67) to head (b5a3fad).
Report is 12 commits behind head on main.

Files with missing lines	Patch %	Lines
...e/tier4_planning_rviz_plugin/path/display_base.hpp	0.00%	28 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8972      +/-   ##
==========================================
- Coverage   26.16%   26.15%   -0.02%     
==========================================
  Files        1302     1303       +1     
  Lines       96917    96956      +39     
  Branches    39150    39155       +5     
==========================================
  Hits        25354    25354              
- Misses      68900    68939      +39     
  Partials     2663     2663              

Flag	Coverage Δ		*Carryforward flag
differential	0.00% <0.00%> (?)
total	26.16% <ø> (+<0.01%)	⬆️	Carriedforward from aacafb0

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[xmfcx]

Videos

https://www.youtube.com/playlist?list=PL97OXOB9UA-gSyZWr3VVn4dNnBtt0lqTp

[xmfcx]

I've also made changes. So it'd be good if you also reviewed @yukkysaito @takayuki5168