Enter the team lineups at the start of a set
Arguments
- x
 datavolley: a datavolley object
- set_number
 integer: set number, 1–3 for beach or 1–5 for indoor
- lineups
 list: two-element list with numeric vectors of player numbers. Each lineup is
for indoor, of length 6, 7, or 8 (first 6 are player jersey numbers in positions 1–6, elements 7 and 8 are optionally the libero jersey numbers)
for beach, of length 2
- setter_positions
 integer: two-element integer vector giving the position on court of the two setters. At least one of
setter_positionsorsettersmust be provided for indoor. Ignored for beach- setters
 integer: two-element integer vector giving the jersey numbers of the two setters. At least one of
setter_positionsorsettersmust be provided for indoor. Ignored for beach
