ENH: remove .apply in predict_transport_mode

[bifbof]

Just a small PR I came around to do.

• replaced an .apply that assigns categories based on speed with the pd.cut function. This complicates the code a bit, but not that much. Moves basically all computation to pandas
• removed an error if the input dictionary isn't sorted and instead just sort the input.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (495443f) 93.30% compared to head (d55f398) 93.32%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #596      +/-   ##
==========================================
+ Coverage   93.30%   93.32%   +0.01%     
==========================================
  Files          33       33              
  Lines        2076     2067       -9     
  Branches      368      364       -4     
==========================================
- Hits         1937     1929       -8     
  Misses        127      127              
+ Partials       12       11       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[hongyeehh]

Thanks for the change. imo the changed version is also easy to understand