Hard to pass multiplayer Player to function

Describe the bug

There's no way to pass a 'player' to a function -- you have to either pass the player number or the associated sprite & then get the player from that.

To Reproduce Steps to reproduce the behavior:

Go to blocks project
create a function
see that there's no way to pass in a player
end up having to pass in a number, and then call the 'player [index]' whenever calling the function / 'player at [index]' inside the function

Expected behavior

Should be able to pass in a Player like we can pass in a Sprite (but only when multiplayer extension is present I guess?), or we should have a fallback 'Other' at the end that compiles to any (similar behavior to array)

for what it's worth this is the downside of making a full type vs just using number for player, but I don't think kids would have understood you could use number anyway / they'd both be places where people wouldn't know what to do.

microsoft / pxt-arcade

Hard to pass multiplayer Player to function #5633