fix(map_based_prediction): suppress spell check failure

[h-ohta]

Description

suppress spell check failure for map_based_prediction

• add routable as ignore word to .cspell-partial.json
• Sgnal -> Signal
• additon -> addition

Related links

Tests performed

I check spell check is succeess.

Notes for reviewers

Interface changes

Effects on system behavior

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[YoshiRi]

LGTM

[h-ohta]

I added routable to autoware-spell-check-dict.
tier4/autoware-spell-check-dict#654

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (78eea31) 14.84% compared to head (9890170) 14.84%.
Report is 4 commits behind head on main.

Files	Patch %	Lines
...based_prediction/src/map_based_prediction_node.cpp	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6403   +/-   ##
=======================================
  Coverage   14.84%   14.84%           
=======================================
  Files        1838     1838           
  Lines      126712   126712           
  Branches    37976    37976           
=======================================
  Hits        18816    18816           
  Misses      86649    86649           
  Partials    21247    21247           

Flag	Coverage Δ		*Carryforward flag
differential	0.00% <0.00%> (?)
total	14.84% <ø> (+<0.01%)	⬆️	Carriedforward from 78eea31

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

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