feat(pid_longitudinal_controller): add maker for stop reason

[takayuki5168]

Description

Added a text marker of "steering not converged" to easily notice that the ego keeps stopped since the steering control is not converged.

Disabled by default.

Tests performed

psim

Effects on system behavior

Nothing

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[codecov]

Codecov Report

Attention: Patch coverage is 30.00000% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 14.78%. Comparing base (888fec6) to head (aa23513).
Report is 21 commits behind head on main.

Files	Patch %	Lines
...nal_controller/src/pid_longitudinal_controller.cpp	30.00%	0 Missing and 7 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6579      +/-   ##
==========================================
- Coverage   14.78%   14.78%   -0.01%     
==========================================
  Files        1917     1917              
  Lines      132012   132017       +5     
  Branches    39228    39227       -1     
==========================================
  Hits        19523    19523              
- Misses      90699    90702       +3     
- Partials    21790    21792       +2     

Flag	Coverage Δ		*Carryforward flag
differential	39.95% <30.00%> (?)
total	14.78% <ø> (-0.01%)	⬇️	Carriedforward from 9b5a372

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

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[shmpwk]

LGTM