build(freespace_planning_algorithms): add nlohmann-json-dev dependency

[esteve]

Description

Added dependency nlohmann-json3-dev, used in https://github.com/autowarefoundation/autoware.universe/blob/main/planning/freespace_planning_algorithms/src/rrtstar_core.cpp#L17

See autowarefoundation/autoware#3222

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[codecov]

Codecov Report

Base: 11.61% // Head: 11.66% // Increases project coverage by +0.04% 🎉

Coverage data is based on head (caa1166) compared to base (e91af6f).
Patch coverage: 7.31% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2818      +/-   ##
==========================================
+ Coverage   11.61%   11.66%   +0.04%     
==========================================
  Files        1319     1319              
  Lines       92105    92174      +69     
  Branches    24416    24461      +45     
==========================================
+ Hits        10700    10752      +52     
  Misses      70234    70234              
- Partials    11171    11188      +17     

Flag	Coverage Δ		*Carryforward flag
differential	61.55% <0.00%> (?)
total	11.61% <7.50%> (ø)		Carriedforward from e91af6f

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

Impacted Files	Coverage Δ
...ocalization/ekf_localizer/src/state_transition.cpp	100.00% <ø> (ø)
...y_planner/include/utilization/trajectory_utils.hpp	0.00% <0.00%> (ø)
...ity_smoother/src/motion_velocity_smoother_node.cpp	0.00% <0.00%> (ø)
..._smoother/analytical_jerk_constrained_smoother.cpp	0.00% <0.00%> (ø)
...n_velocity_smoother/src/smoother/smoother_base.cpp	0.00% <0.00%> (ø)
...ms/test/src/test_freespace_planning_algorithms.cpp	55.68% <14.28%> (-0.03%)	⬇️
...ace_planning_algorithms/src/abstract_algorithm.cpp	83.80% <50.00%> (+2.07%)	⬆️
...eespace_planning_algorithms/abstract_algorithm.hpp	57.14% <100.00%> (+7.14%)	⬆️
... and 4 more

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