Added scc function for graph class

[spirosmaggioros]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 8 lines in your changes missing coverage. Please review.

Project coverage is 89.88%. Comparing base (5fecbc7) to head (e9614a7).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
src/classes/graph/graph.h	79.48%	0 Missing and 8 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #93   +/-   ##
=======================================
  Coverage   89.88%   89.88%           
=======================================
  Files         148      148           
  Lines        6801     6881   +80     
  Branches      871      883   +12     
=======================================
+ Hits         6113     6185   +72     
  Misses        291      291           
- Partials      397      405    +8     

Files with missing lines	Coverage Δ
tests/graph/graph.cc	100.00% <100.00%> (ø)
src/classes/graph/graph.h	68.94% <79.48%> (+1.61%)	⬆️