Bootstrap nycr along with everything else
Confirming that arena notes containing strings are always null-terminated.  The null terminator counts toward the raw size of the note, but does not count toward the logical size.  The limit-pointer will therefore always point to a null byte.
Demangling a search-and-replace error.
Fixing a bug where the hinted pin size for a core string was short by 1 because the null-terminator was not included in the calculated size.
Adding an IsVoid function to Atom::TCore
1. Throwing an error when trying to de-reference a key that does not exist (when it's not being read as an optional of that type)
2. Using IsVoid to reduce the instruction count when reading from the database as an optional.
base/json now correctly decodes strings containing backslash-u sequences.
Missing JSON fields are now ok if the data type is nullable.