Support long directive names in the `{$IFOPT}` directive

### Prerequisites

- [x] This improvement has not already been suggested.
- [x] This improvement would be generally useful, not specific to my code or setup.

### Engine area

Delphi language support

### Improvement description

Delphi 13 has added support for long directive names in `{$IFOPT}`.

We'll need to add support to the `CompilerDirectiveParser`.

## See
- [$IFOPT: Long directives support](https://docwiki.embarcadero.com/RADStudio/Florence/en/IFOPT_directive_(Delphi)#Long_directives_support)

### Rationale

Delphi 13 support.