feat(map_loader): show intersection areas

[satoshi-ota]

Description

Add util function to show intersection area.

Tests performed

Psim.

Effects on system behavior

Nothing.

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[codecov]

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (c3a1a19) 11.34% compared to head (edc57ab) 11.31%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #211      +/-   ##
==========================================
- Coverage   11.34%   11.31%   -0.04%     
==========================================
  Files          36       36              
  Lines        2652     2660       +8     
  Branches     1357     1363       +6     
==========================================
  Hits          301      301              
- Misses       1931     1939       +8     
  Partials      420      420              

Flag	Coverage Δ		*Carryforward flag
differential	9.64% <0.00%> (?)
total	11.34% <ø> (ø)		Carriedforward from c3a1a19

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

Files	Coverage Δ
tmp/lanelet2_extension/lib/visualization.cpp	0.00% <0.00%> (ø)

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[mitsudome-r]

LGTM