Second Draft: Primary Type Syntax

[Quirin Schroll]

https://github.com/Bolpat/DIPs/blob/0bfe22921d99ea18f9a669e13e4c00741c82a63a/DIPs/DIP-2NNN-QFS.md

**Major changes**
* Added proposing to fix [Issue 
24007](https://issues.dlang.org/show_bug.cgi?id=24007), too.
* Simplified the grammar changes
* Better table of contents
* Added a section exploring an alternative that preserves the max 
munch principle
* Added a section dedicated to linkage attributes

**Abstract**

The goal of this proposal is that every type expressible by D’s 
type system also has a representation as a sequence of D tokens.
The type constructs that lack a representation are function 
pointer and delegate types that return by reference and/or have a 
non-default linkage.