refactor(tier4_planning_rviz_plugin): create abstract class for footprint

[takayuki5168]

Description

Footprint for path with lane id, path, trajectory is almost same implementation.
Therefore, I created an abstract class for them.

The only difference among the footprints is that path with lane id has lane_id visualization.

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[codecov]

Codecov Report

Base: 11.63% // Head: 11.62% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (f6ec735) compared to base (d30616f).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2870      +/-   ##
==========================================
- Coverage   11.63%   11.62%   -0.01%     
==========================================
  Files        1321     1322       +1     
  Lines       92199    92265      +66     
  Branches    24471    24471              
==========================================
  Hits        10726    10726              
- Misses      70287    70353      +66     
  Partials    11186    11186              

Flag	Coverage Δ		*Carryforward flag
differential	0.00% <0.00%> (?)
total	11.64% <ø> (+0.01%)	⬆️	Carriedforward from b3e9014

*This pull request uses carry forward flags. Click here to find out more.

Impacted Files	Coverage Δ
...ing_rviz_plugin/include/path_footprint/display.hpp	0.00% <0.00%> (ø)
...viz_plugin/include/path_footprint/display_base.hpp	0.00% <0.00%> (ø)
...lanning_rviz_plugin/src/path_footprint/display.cpp	0.00% <0.00%> (ø)

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[takayuki5168]

@yukkysaito Could you review the PR.

[yukkysaito]

LGTM