Try to parse a 32-bit integer from the current cursor position.
Input byte buffer.
Cursor advanced past the parsed integer.
Exclusive end index.
a Result; { ok: false } with a MimeError on malformed input or integer overflow.
{ ok: false }
MimeError
text, cursor, or endIndex has an invalid type.
text
cursor
endIndex
cursor.index or endIndex is outside text.
cursor.index
Try to parse a 32-bit integer from the current cursor position.