📝 Updated documentation

[marcelwa]

This PR prettifies many parts of the documentation, makes use of MathJax where appropriate, and fixes inconsistencies as well as outdated docstrings.

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[codecov]

Codecov Report

Merging #87 (2212c4b) into main (7c0a843) will not change coverage.
The diff coverage is 100.00%.

❗ Current head 2212c4b differs from pull request most recent head e61a25e. Consider uploading reports for the commit e61a25e to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #87   +/-   ##
=======================================
  Coverage   93.63%   93.63%           
=======================================
  Files          58       58           
  Lines        6083     6083           
=======================================
  Hits         5696     5696           
  Misses        387      387           

Impacted Files	Coverage Δ
...orithms/graph/generate_edge_intersection_graph.hpp	94.66% <ø> (ø)
...nclude/fiction/algorithms/graph/graph_coloring.hpp	96.29% <ø> (ø)
.../fiction/algorithms/iter/aspect_ratio_iterator.hpp	100.00% <ø> (ø)
...hms/network_transformation/fanout_substitution.hpp	98.91% <ø> (ø)
...ithms/network_transformation/network_balancing.hpp	97.18% <ø> (ø)
...thms/network_transformation/network_conversion.hpp	82.25% <ø> (ø)
include/fiction/algorithms/path_finding/cost.hpp	100.00% <ø> (ø)
...clude/fiction/algorithms/path_finding/distance.hpp	100.00% <ø> (ø)
...on/algorithms/path_finding/enumerate_all_paths.hpp	97.72% <ø> (ø)
...tion/algorithms/path_finding/jump_point_search.hpp	98.42% <ø> (ø)
... and 41 more

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[github-actions]

clang-tidy review says "All clean, LGTM! 👍"