allow builder method and protected constructor

[caleb-cushing0-kr]

I would like a static builder factory with a protected constructor option. Hibernate and Jackson both do not require public constructors.

@Value.Style(
    protectedNoargConstructor = true,
    builder = "builder", // shouldn't be needed "new" would also do as today, but public
)

I kind of still want this as a more readable api

@Value.Style( constructorPrivacy = Privacy.PACKAGE )

[caleb-cushing0-kr]

my workaround, which may be better overall is simply to write my own static factor on the originating class/interface