CPP1116 — Add mapping for IDL4.2 standardized annotations

IDL4.2 defines in section 8.3 a set of standardized annotations where it looks some of them impact the IDL to C++11 language mapping like @optional, @final, @range, @default and maybe others. There should be a new paragraph in the IDL to C++11 language mapping which describes how these standardized annotations map to C++11, like @optional to std::optional, @final to final, etc

Defer work on this issue

IDL 4.2 has 24 Standardized Annotations which vary widely in terms of their applicability to a language mapping. Since other RTF issues request specific annotations that are more urgent, defer this broad issue to the next RTF.