Added v2 of legs

[jorgecardleitao]

This version of the dataset:

1. contains a smaller set of columns
2. contains 2024 up to the last month
3. contains the total distance of the leg (i.e. the actual flown distance)
4. contains time above 30k feet and 40k feet

In other words, this version removed the commercial aviation calculation, airports, etc.

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 98.88143% with 5 lines in your changes missing coverage. Please review.

Project coverage is 96.86%. Comparing base (b07e1c4) to head (cc9efaf).

Files	Patch %	Lines
src/legs.rs	97.93%	3 Missing ⚠️
src/aircraft.rs	98.48%	1 Missing ⚠️
src/trace_month.rs	96.15%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #68      +/-   ##
==========================================
+ Coverage   86.91%   96.86%   +9.95%     
==========================================
  Files          16       14       -2     
  Lines        1070     1245     +175     
==========================================
+ Hits          930     1206     +276     
+ Misses        140       39     -101     

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