Make optional.Option[T] type serializable

[6543]

make the generic Option type de-/serializable for json and yaml

[lunny]

This PR should be merged first then #29329

[6543]

They are related but independent :)

As the changed struct in mentioned pull are not used for de-/serializion

[6543]

PS: I'm happy to see it merged once it has sufficient reviews ;)

[KN4CK3R]

When I added the option type I had a look at the chi binding which is needed for form binding but that looked more complicated. But we should add support there too before we start to use the option type in forms.

[6543]

@KN4CK3R yes but that's outside of this pull scope i would say ?

[KN4CK3R]

yes, just want to share my thoughts.

[6543]

PS: optional.None[bool]() should be equivalent to not set them, else it's a bug in the optional.Option type itself

[KN4CK3R]

PS: optional.None[bool]() should be equivalent to not set them, else it's a bug in the optional.Option type itself

It is identical.