searchcount() to return positions of matches

[noscript]

Is your feature request about something that is currently impossible or hard to do? Please describe the problem.

It is impossible to get the positions of all search matches without calling searchpos() in a loop. searchcount() counts all the matches, so it must have the position information of the matches, so it would be natural if it included that information in the result.

Describe the solution you'd like

Proposal 1:
searchcount() would include a new 'pos' key in the result Dictionary that would be a List of Lists with the line and column position of the matches.

echo searchcount(...)
" results {'current': 1, 'exact_match': 0, 'incomplete': 0, 'maxcount': 99, 'total': 3, 'pos': [[1, 4], [5, 2], [8, 1]]}

Proposal 2:
New function searchposlist() that would be the same as searchpos(), but returning a List of Lists with the line and column position of the matches:

echo searchposlist(...)
" results [[1, 4], [5, 2], [8, 1]]

Proposal 1 is the preferred one, because searchcount() would be providing more useful information than searchposlist().

Describe alternatives you've considered
This is the shortest snippet I came up with to obtain the positions:

let positions = []
let lnum = 1
let col = 0
while v:true
  call setpos('.', [0, lnum, col + 1, 0])
  let [lnum, col] = searchpos('hello', 'cW')
  let positions += [[lnum, col]]

  if lnum == 0 || col == 0
    break
  endif
endwhile