Represents an INI section with its header and entries.
A section groups related INI lines together. The section property contains
the section header (or null for the global section), and entries contains
all lines that belong to this section (assignments, comments, and trailers).
section: IniLineSection | null
The section header, or null for the global section.
entries: (IniLineAssign | IniLineComment | IniLineTrailer)[]
Lines belonging to this section (assignments, comments, trailers).