feat(tier4_planning_launch): add nearest search param

[takayuki5168]

Signed-off-by: Takayuki Murooka takayuki5168@gmail.com

Description

added nearest search param for new algorithm of nearest index search.

Related links

#1581

Tests performed

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[codecov]

Codecov Report

Merging #1582 (5836ee9) into main (6f75dad) will not change coverage.
The diff coverage is n/a.

❗ Current head 5836ee9 differs from pull request most recent head bfdc988. Consider uploading reports for the commit bfdc988 to get more accurate results

@@           Coverage Diff           @@
##             main    #1582   +/-   ##
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  Coverage   10.74%   10.74%           
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  Files        1115     1115           
  Lines       78815    78815           
  Branches    18560    18560           
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  Hits         8465     8465           
  Misses      61492    61492           
  Partials     8858     8858           

Flag	Coverage Δ		*Carryforward flag
differential	∅ <ø> (?)
total	10.72% <ø> (ø)		Carriedforward from 6f75dad

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