Define new class for Adjacency matrix

[sbaldu]

Deifne a new AdjacencyMatrix class that implements a sparse matrix in CSR format (issue #254).

[github-advanced-security]

Cppcheck (reported by Codacy) found more than 20 potential problems in the proposed changes. Check the Files changed tab for more details.

[codecov]

Codecov Report

Attention: Patch coverage is 99.29825% with 2 lines in your changes missing coverage. Please review.

Project coverage is 90.36%. Comparing base (1363a88) to head (12f0076).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
src/dsm/sources/AdjacencyMatrix.cpp	96.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #257      +/-   ##
==========================================
+ Coverage   89.80%   90.36%   +0.56%     
==========================================
  Files          34       37       +3     
  Lines        4531     4816     +285     
  Branches      447      455       +8     
==========================================
+ Hits         4069     4352     +283     
- Misses        462      464       +2     

Flag	Coverage Δ
unittests	90.36% <99.29%> (+0.56%)	⬆️

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