Fuselage fuel tank cleanup

[ngomezve]

This PR simplifies the structure of the code used to size and calculate the weight of fuel tanks in the fuselage. The previous code retained functionality that is no longer needed (e.g., calculating constant boiloffs when now there is a dedicated boiloff model) and was more cumbersome than it needs to be.

The PR moves some pieces of code from wsize() to tank_size() and update_fuse!() and also changes the inputs of these functions so that they only need the ac object.

The changes introduced in the PR are to the code structure only and should not change the underlying models.

[codecov]

Codecov Report

Attention: Patch coverage is 92.98246% with 8 lines in your changes missing coverage. Please review.

Project coverage is 79.17%. Comparing base (e182855) to head (a5d9106).

Files with missing lines	Patch %	Lines
src/cryo_tank/tanksize.jl	90.56%	5 Missing ⚠️
src/cryo_tank/tanktools.jl	33.33%	2 Missing ⚠️
src/structures/update_fuse.jl	97.29%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #119      +/-   ##
==========================================
+ Coverage   79.14%   79.17%   +0.02%     
==========================================
  Files          82       82              
  Lines       13585    13597      +12     
==========================================
+ Hits        10752    10765      +13     
+ Misses       2833     2832       -1     

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[aditeyashukla]

Looks great! I think the reduction in wsize is quite clean. I think maybe @argonaut22 can look into the flags for the tank position when he fixes the pari flags like iifwing (although I cant think of anything better than the strings we have right now).
Maybe if you want to be safe we can do lowercase(tank_placement)

[ngomezve]

This commit fixes a bug in which the tank sea level temperature was not being updated in off-design. It also fixes a minor bug if the aircraft is a double-decker: the issue was in update_fuse_for_pax, which did not store one output. The inputs for this function have also been simplified.