New cell list pair

[lmiq]

This PR will implement the construction of two cell lists and use projection and partitioning also when two sets are provided, to test performance improvements and potentially fix #108

[codecov]

Codecov Report

Attention: Patch coverage is 96.96970% with 10 lines in your changes missing coverage. Please review.

Project coverage is 96.28%. Comparing base (9d9226d) to head (da991a4).

Files with missing lines	Patch %	Lines
src/core_computing/auxiliary_functions.jl	88.23%	4 Missing ⚠️
src/CellLists.jl	90.32%	3 Missing ⚠️
src/core_computing/cross.jl	98.59%	2 Missing ⚠️
src/core_computing/self.jl	98.63%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #110      +/-   ##
==========================================
+ Coverage   91.14%   96.28%   +5.14%     
==========================================
  Files           9       12       +3     
  Lines        1208     1265      +57     
==========================================
+ Hits         1101     1218     +117     
+ Misses        107       47      -60     

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