C++23's static lambdas

[lefticus]

Remember - where the standard goes, so goes the lambda

https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p1169r4.html

Best Practice - should this be the default for our lambdas now?!

[lefticus]

Link to paper and motivations: https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p1169r4.html

[lefticus]

Coming in Ep472