docs(pure_pursuit): add readme

[TakaHoribe]

Description

add readme

Tests performed

Not applicable.

Effects on system behavior

Not applicable.

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[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.01 🎉

Comparison is base (a58c94e) 14.20% compared to head (e3b40d4) 14.22%.

❗ Current head e3b40d4 differs from pull request most recent head 9cf1495. Consider uploading reports for the commit 9cf1495 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4220      +/-   ##
==========================================
+ Coverage   14.20%   14.22%   +0.01%     
==========================================
  Files        1597     1594       -3     
  Lines      109806   109680     -126     
  Branches    31487    31487              
==========================================
+ Hits        15601    15603       +2     
+ Misses      77258    77131     -127     
+ Partials    16947    16946       -1     

Flag	Coverage Δ		*Carryforward flag
differential	13.64% <ø> (?)
total	14.22% <ø> (+0.01%)	⬆️	Carriedforward from b0f1c6c

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

see 5 files with indirect coverage changes

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