Support `NameOf` intrinsic

[cirras]

Prerequisites

• This improvement has not already been suggested.
• This improvement would be generally useful, not specific to my code or setup.

Engine area

Delphi language support

Improvement description

Delphi 13 has added a new intrinsic routine called NameOf.

You can pass it any identifier, and it returns the "matching string representation".
They haven't documented it very well, and only say it's "matching the way the similarly named C# function works".

See

• RSP-13290: NameOf(T) compiler (magic) function
• nameof expression (C# reference)

Rationale

Delphi 13 support.