New extension AgentsGraphVisualizations

[Tortar]

Solves #872

Now the code in #863 I posted works without needing GraphMakie as a dependency!

[codecov-commenter]

Codecov Report

Merging #874 (4cd83f9) into main (aae133b) will decrease coverage by 0.11%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #874      +/-   ##
==========================================
- Coverage   71.99%   71.88%   -0.11%     
==========================================
  Files          42       42              
  Lines        2746     2746              
==========================================
- Hits         1977     1974       -3     
- Misses        769      772       +3     

Files Changed	Coverage Δ
...tsGraphVisualizations/AgentsGraphVisualizations.jl	0.00% <0.00%> (ø)
ext/AgentsVisualizations/src/abmplot.jl	0.00% <0.00%> (ø)

... and 2 files with indirect coverage changes

:mega: We’re building smart automated test selection to slash your CI/CD build times. Learn more

[Tortar]

I'm almost sure it's ok so I merge :-)