Feature/serialization support

[joaquintides]

If we're OK with this PR, we need to sync up its merging with the removal of serialization functionality in

https://github.com/boostorg/serialization/blob/boost-1.83.0/include/boost/serialization/boost_unordered_map.hpp https://github.com/boostorg/serialization/blob/boost-1.83.0/include/boost/serialization/boost_unordered_set.hpp

I can contact Robert for this as soon as the PR is approved. Thank you!

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Codecov Report

Merging #207 (ca2a46f) into develop (bcd8969) will increase coverage by 0.01%. The diff coverage is 98.26%.

Additional details and impacted files

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