[Bug] Wrong behavior for the life extraction

[lrnv]

@rimhajal, maybe the graphs you did for the paper could be added to the docs here. But it needs to be fixed because the implemented behavior was in fact wrong. This PR fixes it and your graph shoul dbe fixed accordingly:

• When reaching the last line, we should continue to go right
• When reaching the last column, we should continue to go down
• The last cell ONLY is up until infinity, so the red arrow should rather be a red "point" inside the last cell, to indicate the end of the trip here.

So the final trip looks like (d means down and r means right) : drdrdrdr OR rdrdrdrd then rrrrrrrrrrr if bottom line reached or dddddddd if last column reached, then eternity in the last cell.

[codecov]

Codecov Report

❌ Patch coverage is 84.61538% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.91%. Comparing base (84b2edd) to head (e8dbee7).
⚠️ Report is 24 commits behind head on main.

Files with missing lines	Patch %	Lines
src/Life.jl	84.61%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #23      +/-   ##
==========================================
+ Coverage   73.68%   73.91%   +0.22%     
==========================================
  Files           4        4              
  Lines         114      115       +1     
==========================================
+ Hits           84       85       +1     
  Misses         30       30              

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[rimhajal]

so for someone born in 2000, in 2020 at the last column it would go down?

[lrnv]

When reaching the last column, go down, but that was already the previous behavior.
When reaching the last line, go right, which was not the previous behavior

[lrnv]

Hum... Now tahta i see the codecov report showing that the behavior was not tested before and is still not tested, I really wonder which is the best option of the two. For example, which one produces the more sensible life times for elders ? a life expectency that is not too high ? etc...

For the paper, let's make the change to the graphs. For this PR, let's wait until we have proper tests to eventually merge it. Sorry about the noise @rimhajal