Add jsdoc tags when needed

After the migration of the new syntax, some previously inferred documentation properties need to be explicitly declared.
The required declaration have been added to the classe that have already been migrated to the new syntax.
There is a circular dependency between `aria.utils.json.JsonSerializer` and `aria.utils.Json`, such that this require should not be done at the beginning of the file, otherwise, the variable will contain a temporary object, which is not the class definition of `Json`.